CN213145559U - Labyrinth disc pressure reducing valve - Google Patents
Labyrinth disc pressure reducing valve Download PDFInfo
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- CN213145559U CN213145559U CN202021710221.5U CN202021710221U CN213145559U CN 213145559 U CN213145559 U CN 213145559U CN 202021710221 U CN202021710221 U CN 202021710221U CN 213145559 U CN213145559 U CN 213145559U
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Abstract
The utility model discloses a labyrinth disk pressure reducing valve. An upper cavity and a lower cavity are formed in the valve body, and the medium inlet and the medium outlet are communicated with the upper cavity and the lower cavity; the valve seat is provided with a labyrinth disc sleeve, the valve cover and the labyrinth disc sleeve are both provided with central through holes, and the valve cover and the central through holes of the labyrinth disc sleeve are coaxially and vertically communicated; the valve seat is coaxially formed by an upper cylinder and a lower cylinder, an inverted cone inner cavity and a cylindrical inner cavity are formed in the upper cylinder and the lower cylinder, the inverted cone inner cavity is provided with a throttling orifice plate, the cylindrical inner cavity is provided with a fluid outlet hole, the upper edge of the valve seat is provided with an annular groove, an annular boss is arranged below the sleeve, and the annular boss is embedded into the annular groove; the throttling orifice plate is embedded into the annular groove; the lower end of the valve rod is connected with the valve core, and the upper end of the valve rod is connected with the valve rod position regulator. The utility model discloses can adjust well and then adjust control work in the maze relief pressure valve maze runner for avoid the cavitation phenomenon, and can real-time supervision maze relief pressure valve maze runner internal pressure, velocity of flow and energy dissipation's the condition.
Description
Technical Field
The utility model relates to a fluid valve especially relates to a labyrinth disc relief pressure valve.
Background
The regulating valve plays a role in regulating medium pressure and flow in the process of material conveying in process industry, and is a key part for ensuring normal operation of various reaction equipment, cold exchange equipment and fractionation equipment in modern process industry. In the process of high differential pressure regulation of the existing regulating valve, a medium is easy to cavitate to cause cavitation erosion (cavitation erosion), under the working condition of existence of solid particles, the problem of erosion abrasion failure can also occur, and the combined action of cavitation erosion and erosion abrasion causes great harm to the safe and stable operation of a valve core. In contrast, the labyrinth regulating valve has the characteristics of high pressure drop and high flow speed relative to other valves, and a labyrinth flow channel on a disc of an inner valve core is a core element for generating front and back pressure drops of fluid, so that the labyrinth regulating valve is widely applied to a coal chemical steam pressure reducing valve and a power station boiler feed pump recirculation system. In view of the harsh operating conditions of petrochemical engineering, coal chemical engineering and nuclear power engineering and the ubiquitous high-temperature, high-pressure and even hydrogen-contacting operating conditions, the flash evaporation cavitation phenomenon easily occurs to the valve in the pressure reduction flowing process. The cavitation collapse formed by cavitation can generate local micro high pressure to cause the flow channel on the labyrinth disc to suffer serious damage, thereby causing leakage, seriously influencing the flow control precision and further threatening the normal safe operation of the core unit device.
For the pressure reducing flow characteristic inside the labyrinth disk pressure reducing valve, the existing research has made intensive research on the pressure reducing flow characteristic of the labyrinth valve, from the aspects of flow characteristic, cavitation mechanism and the like, for example, the labyrinth flow channels connected in series and parallel are adopted for pressure reduction and flow regulation. The more the labyrinth valve stages are obtained based on numerical simulation, the more stable the pressure reduction is, and for the pressure reduction flow characteristics of labyrinth flow passages with different stages, when the stages reach the critical stages, the pressure reduction benefit obtained by increasing the stages is relatively small. Based on the pressure reduction flow characteristics of labyrinth flow passages with different sizes, the labyrinth flow passages based on combination of flow division and opposite impact are provided in the existing research, along with the increase of the width of an inlet and an outlet, the flow is in an increasing trend, and the outlet pressure and the outlet speed are in a descending trend, so that a novel flow passage structure is designed to meet the circulation requirement.
Therefore, the research on the internal structure and control regulation of the labyrinth disc pressure reducing valve is urgent from the aspects of the sensitivity and control accuracy of the labyrinth valve and the operation reliability and safety of the core unit.
SUMMERY OF THE UTILITY MODEL
In order to overcome the problem that exists among the background art field, the utility model aims to provide a labyrinth disc relief pressure valve can adjust well and then the regulation control work in the labyrinth flow channel of labyrinth relief pressure valve, realizes the regulation control of labyrinth disc governing valve, is favorable to prolonging the life and the safety and stability operating cycle of labyrinth disc relief pressure valve to can real-time supervision labyrinth relief pressure valve labyrinth flow channel internal pressure, the condition of velocity of flow and energy dissipation.
In order to achieve the purpose of the utility model, the utility model adopts the technical proposal that:
the labyrinth disc pressure reducing valve comprises a valve body, a valve seat, a labyrinth disc sleeve, a valve cover, a valve rod, a valve core, a throttling orifice plate and a valve rod position regulator; the top of the valve body is provided with a circular opening, a valve cover is installed in the circular opening, a central through hole is formed in the valve cover in the vertical direction, an upper cavity and a lower cavity are formed in the valve body, the end parts of the two sides of the valve body are provided with a horizontal medium inlet and a horizontal medium outlet, the medium inlet is communicated with the upper cavity of the valve body, and the medium outlet is communicated with the lower cavity of the valve body; the upper cavity and the lower cavity are connected through a through hole, a valve seat is arranged at the through hole, a labyrinth disc sleeve is arranged on the valve seat, and the lower part of the valve cover and the upper part of the labyrinth disc sleeve are mutually sleeved in an interference manner; the valve cover and the labyrinth disc sleeve are both provided with central through holes, and the central through holes of the valve cover and the labyrinth disc sleeve are coaxially and vertically communicated; the valve seat mainly comprises an upper cylinder and a lower cylinder which are coaxial, the diameter of the upper cylinder is larger than that of the lower cylinder, an inverted cone inner cavity is formed in the center of the upper cylinder, a cylindrical inner cavity is formed in the lower cylinder, a throttling orifice plate provided with a vertical throttling hole is arranged on the top end face of the inverted cone inner cavity, the inverted cone inner cavity is communicated with the bottom of a central through hole of the labyrinth disc sleeve through the throttling orifice plate, the inverted cone inner cavity is communicated with the cylindrical inner cavity, orifice plates provided with horizontal partition throttling holes are uniformly distributed between the inverted cone inner cavity and the cylindrical inner cavity, a plurality of fluid guide holes are uniformly distributed on the bottom end face of the cylindrical inner cavity, and the fluid guide holes; the edge of the top surface of the cylinder at the upper part of the valve seat is provided with an annular groove, the edge of the lower end surface of the labyrinth disc sleeve is provided with an annular boss, and the annular boss of the labyrinth disc sleeve is embedded into the annular groove of the valve seat to form connection matching; the middle part of the lower end surface of the labyrinth disc sleeve is provided with an annular groove, and the throttle orifice plate is embedded into the annular groove of the labyrinth disc sleeve; the valve rod penetrates through the central through hole of the valve cover, the lower end of the valve rod penetrates through the central through hole of the valve cover, the rear end part of the valve rod is hinged with a cylindrical valve core, and the upper end of the valve rod penetrates through the central through hole of the valve cover and then is connected with the valve rod position regulator.
A plurality of layers of labyrinth discs are arranged in the middle barrel of the labyrinth disc sleeve from bottom to top, and a plurality of S-shaped horizontal labyrinth flow channels which are communicated in the radial direction are formed in the labyrinth discs.
The S-shaped horizontal labyrinth flow channel is a flow channel bent at a right angle and is divided into a plurality of sections of sub-flow channels according to the radial flow direction, the middle part of each section of sub-flow channel is provided with a cross section, and the inner wall of the cross section is provided with a plurality of pressure strain gauges and a plurality of flow meters along the circumference.
The lower end of the valve cover is provided with an annular concave hole, the upper part of the labyrinth disc sleeve is provided with an annular boss, and the annular boss is sleeved in the annular concave hole to form interference fit.
The valve core is internally provided with one or more supporting radial plates at the center, a circumferential groove is formed around the excircle of the middle upper part of the valve core, and an annular graphite strip is embedded in the circumferential groove.
The annular gap between the periphery of the valve cover and the circular opening of the valve body is internally provided with an annular sealing gasket and an annular pressing ring from bottom to top, the valve cover above the annular pressing ring is externally sleeved with a flange plate, the flange plate is fixedly connected with the outer end face of the circular opening of the valve body through a flange of the valve cover, and the annular sealing gasket and the annular pressing ring are tightly pressed in the annular gap to form sealing.
The valve rod flange is sleeved outside the valve rod above the dust ring, and the valve rod flange is fixedly connected with the outer end face of the valve cover central through hole through a locking nut.
An annular retaining ring, an annular retaining ring and a balance sealing ring are sequentially arranged in an annular gap between the periphery of the top of the valve core connected with the valve rod and the central through hole of the labyrinth disc sleeve from top to bottom.
The utility model has the advantages that:
the utility model discloses can realize better maze video disc governing valve inside work regulation control, improve the operation control precision, avoid cavitation to can monitor the pressure value, the velocity of flow value of the inside different regional positions of maze disc formula relief pressure valve, can be used for realizing the operation optimal control of maze disc formula relief pressure valve.
The utility model is suitable for a high pressure differential's such as petrochemical, coal chemical industry, nuclear power engineering labyrinth valve work and operation.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is an enlarged view of the area W in fig. 1.
FIG. 3 is a schematic view of the single-layer labyrinth disk of FIG. 1.
Fig. 4 is a partially enlarged view of the labyrinth disk flow channel a in fig. 3.
In the figure: the valve comprises a valve body (1), a valve seat (2), a labyrinth disc sleeve (3), a sealing gasket (4), a pressing ring (5), a valve cover flange (6), a valve cover (7), a packing gland (8), a valve rod flange (9), a dust ring (10), a sealing packing (11), a packing base gasket (12), a valve rod (13), a flange plate (14), a baffle ring (15), a check ring (16), a balance sealing ring (17), a valve core (18), a throttling pore plate (19), a supporting radial plate (20), a valve rod position regulator (21), a medium inlet (22), a medium outlet (23), a labyrinth disc (24) and an annular graphite strip (25).
Detailed Description
The present invention will be further explained with reference to the drawings and the embodiments.
As shown in fig. 1 and 2, the labyrinth disc pressure reducing valve includes a valve body 1, a valve seat 2, a labyrinth disc sleeve 3, a valve cover 7, a valve rod 13, a valve core 18, a throttle orifice plate 19 and a valve rod position regulator 21; the top of the valve body 1 is provided with a circular opening, a valve cover 7 is installed in the circular opening, a central through hole is formed in the valve cover 7 in the vertical direction, an upper cavity and a lower cavity are formed in the valve body, the end parts of the two sides of the valve body are provided with a horizontal medium inlet 22 and a horizontal medium outlet 23, the medium inlet 22 is communicated with the upper cavity of the valve body 1, and the medium outlet 23 is communicated with the lower cavity of the valve body 1; the upper cavity and the lower cavity are connected through a through hole, the valve seat 2 is arranged at the through hole, the labyrinth disc sleeve 3 is arranged on the valve seat, and the lower part of the valve cover 7 is in interference fit with the upper part of the labyrinth disc sleeve 3. The lower end of the valve cover 7 is provided with an annular concave hole, the upper part of the labyrinth disc sleeve 3 is provided with an annular boss, and the annular boss is sleeved in the annular concave hole to form interference fit, so that the lower part of the valve cover 7 and the upper part of the labyrinth disc sleeve 3 are mutually sleeved in an interference fit manner. Thus, the circular boss at the upper part of the labyrinth disc sleeve 3 is connected with the groove at the lower part of the valve cover 7 in an embedding way, and the central hole is centered.
The valve cover 7 and the labyrinth disc sleeve 3 are both provided with central through holes, and the valve cover 7 and the central through hole of the labyrinth disc sleeve 3 are vertically and coaxially communicated up and down; disk seat 2 mainly comprises upper portion cylinder and lower part cylinder are coaxial, the cylindrical diameter in upper portion is greater than the cylindrical diameter in lower part, the back taper inner chamber has been seted up at the cylindrical center in upper portion, cylindrical inner chamber has been seted up in the cylinder in lower part, the top end face of back taper inner chamber is equipped with the orifice plate 19 of seting up vertical orifice, the back taper inner chamber is through orifice plate 19 and labyrinth disc sleeve 3's central through-hole bottom UNICOM, back taper inner chamber and cylindrical inner chamber UNICOM, it sets up the orifice plate that the orifice was cut off to the level to be equipped with the equipartition between back taper inner chamber and the cylindrical inner chamber, a plurality of fluid delivery holes are seted up to the bottom terminal surface equipartition.
An annular groove with the depth of 4-6 mm is formed in the edge of the top surface of the cylinder at the upper part of the valve seat 2, an annular boss is arranged on the edge of the lower end face of the labyrinth disc sleeve 3, and the annular boss of the labyrinth disc sleeve 3 is embedded into the annular groove of the valve seat 2 to form connection matching; the middle part of the lower end face of the labyrinth disc sleeve 3 is provided with an annular groove with the depth of 3-5 mm, and the throttle orifice plate 19 is embedded into the annular groove of the labyrinth disc sleeve 3; this results in a coupling fit between the labyrinth disk sleeve 3 and the upper end face of the valve seat 2.
The valve rod 13 penetrates through the central through hole of the valve cover 7, the lower end of the valve rod 13 penetrates through the central through hole of the valve cover 7, the rear end part of the valve rod 13 is hinged with a cylindrical valve core 18, and the upper end of the valve rod 13 penetrates through the central through hole of the valve cover 7 and then is connected with a valve rod position regulator 21.
As shown in fig. 3, a plurality of layers of labyrinth discs 24 are arranged in the middle cylinder of the labyrinth disc sleeve 3 from bottom to top, a plurality of S-shaped horizontal labyrinth flow passages which are radially communicated are formed in the labyrinth discs 24, the plurality of S-shaped horizontal labyrinth flow passages are arranged at intervals along the circumference, and each S-shaped horizontal labyrinth flow passage is radially communicated with the inside and the outside of the labyrinth disc sleeve 3, so that the labyrinth flow passages are arranged in the labyrinth discs to form a labyrinth structure.
As shown in fig. 4, the S-shaped horizontal labyrinth flow channel is a flow channel bent at a right angle, and is divided into a plurality of sub-flow channels according to a radial flow direction, each sub-flow channel is a continuous radial flow section, a cross section is taken at the middle part of each sub-flow channel, a plurality of pressure strain gauges and a plurality of flowmeters are installed on the inner wall of the cross section along the circumference, pressure values of each grid node can be obtained through conversion of the pressure strain gauges, speed values of each grid node can be obtained through conversion of a plurality of installed flowmeters, and it should be noted that the installation position of the flowmeter slightly protrudes from the wall surface.
As shown in fig. 3, it is a single-layer labyrinth disk 24 structure of the labyrinth disk sleeve 3. The structure is formed by mirroring A, B, C, D, E, F along the central direction to have 6 labyrinth flow passages. Taking the flow channel a as an example, the flow channel a includes two inlets and one outlet, the high pressure fluid flows in through the two flow channel inlets and finally flows out from the central hole of the labyrinth plate 24, and in the flow channel with multiple changes of structure, the high pressure fluid is subjected to energy dissipation, and finally the pressure reduction process is completed. Each labyrinth disk sleeve comprises a structure of stacking a plurality of single-layer labyrinth disks in a laminated manner, the structures of the single-layer labyrinth disks are the same, and the positions of labyrinth disk runners of different layers are completely overlapped from a top view, but the runners of each layer are not communicated with each other, so that the multi-runner labyrinth disk sleeve with the multi-layer labyrinth disks connected in parallel is formed.
Fig. 4 is a partially enlarged view of the labyrinth disk flow channel a in fig. 3. For the convenience of subsequent analysis, any one flow channel installed on the labyrinth disk is selected for measurement test. Taking fig. 4 as an example, seven longitudinal sections, namely a section (i), a section (ii), a section (iii), a section (iv), a section (c), and a section (c), are formed in the middle area of the horizontal flow channel. Some longitudinal sections can be arranged according to actual needs, and the more the longitudinal sections are, the more accurate the flow characteristics in the flow channel obtained by testing is, but the cost is increased; if the flow characteristic information of the central area of the cross section is further known, the filament wires which are staggered transversely and longitudinally can be arranged on the rectangular cross section inside the cross section, and the pressure strain gauge and the flowmeter are arranged at the transverse and longitudinal intersection points of the filament wires.
The valve rod 13 is driven by the valve rod position regulator 21 to move up and down, different positions of the valve rod 13 are regulated, and the valve core 18 is further driven to cover different layers of labyrinth discs 24 in the labyrinth disc sleeve 3 to block the circulation of the S-shaped horizontal labyrinth flow passage, so that the opening of the labyrinth disc pressure reducing valve is regulated and controlled.
One or more supporting radial plates 20 are arranged in the center of the interior of the valve core 18, so that the rigidity of the valve core 18 is improved on the basis of ensuring the strength, and the hollow structure in the valve core 18 still has good rigidity.
As shown in fig. 2, a circumferential groove is formed around the outer circle of the middle upper portion of the valve core 18, and an annular graphite strip 25 is embedded in the circumferential groove. The purpose of embedding the annular graphite strip 25 is to keep sealing on one hand, and on the other hand, in view of the self-lubricating function of the graphite strip, the valve rod 13 can drive the valve core 18 to move freely up and down under the action of the valve rod position regulator 21 under the action of high pressure difference, but the vertical distance between the graphite strip 25 and the bottom of the valve core 18 is required to be 20-30 mm higher than the height of the labyrinth disc at the lower part of the labyrinth disc sleeve 3; meanwhile, an annular groove is formed in the outer side area of the lower portion of the valve core and below the graphite strips, so that the valve core 18 and the labyrinth disc sleeve 3 are prevented from being clamped due to unbalanced pressure.
An annular sealing gasket 4 and an annular pressing ring 5 are arranged in an annular gap between the periphery of the valve cover 7 and the circular opening of the valve body 1 from bottom to top, a flange plate 14 is sleeved outside the valve cover 7 above the annular pressing ring 5, the flange plate 14 is fixedly connected with the outer end face of the circular opening of the valve body 1 through a valve cover flange 6 and forms a connection fit with the annular end face of the upper part of the valve body 1, and the annular sealing gasket 4 and the annular pressing ring 5 are tightly pressed in the annular gap. Specifically, the bottom of the annular gap is embedded with an annular sealing gasket 4 to form a first seal, and an annular pressing ring 5 is embedded in the annular gap above the annular sealing gasket 4 to form a second seal.
An annular packing bottom pad 12, a sealing packing 11, a packing gland 8 and a dust ring 10 are embedded into an annular gap between the periphery of a valve rod 13 and a central through hole of a valve cover 7 from bottom to top, a valve cover flange 9 is sleeved outside the valve rod 13 above the dust ring 10, and the valve cover flange 9 is fixedly connected with the outer end face of the central through hole of the valve cover 13 through a locking nut.
As shown in fig. 2, an annular retaining ring 15, an annular retaining ring 16 and a balance seal ring 17 are sequentially arranged in an annular gap between the periphery of the top of a valve core 18 of the valve rod 13 and a central through hole of the labyrinth disc sleeve 3 from top to bottom, the relative positions of the valve core 18 and the labyrinth disc sleeve 3 are determined by the annular retaining ring 15, the annular retaining ring 16 and the balance seal ring 17, and the shaft hole is kept centered.
The test and control process of the flow characteristic of the labyrinth disk pressure reducing valve according to the embodiment of the utility model is as follows:
1) building a circulating pipeline loop, arranging a test valve pipe section in the middle area of the circulating pipeline loop, installing a labyrinth disc pressure reducing valve in the test valve pipe section, wherein the labyrinth disc pressure reducing valve is provided with a labyrinth disc sleeve 3, and flushing and pressurizing the circulating pipeline loop by using a circulating pump and a pressurizing pump to ensure that the inlet pressure of the labyrinth disc pressure reducing valve is between 10.7MPa and 14.7 MPa;
2) for a single-layer labyrinth disc arranged in a labyrinth disc sleeve 3, the single-layer labyrinth disc is divided into a plurality of sub-flow passages according to the radial flow direction, each section is a continuous section which flows in the radial direction, the middle part of each section of the sub-flow passages is provided with a longitudinal section which is specifically a section I, a section II, a section III, a section IV, a section V, a section IV and a section V, n pressure strain gauges and m flow meters are respectively arranged on the inner wall of the flow passage along the longitudinal sections of the plurality of sub-flow passages, and the flow meters are converted to obtain the flow velocity after detecting the flow;
3) flushing the whole circulating pipeline loop by using a circulating pump, and ensuring that the inlet pressure of the labyrinth disc pressure reducing valve is 10.7MPa through a pressurizing pump and a flow control valve at the downstream of the labyrinth disc pressure reducing valve;
4) in the test process, n pressure strain gauges and m flowmeters which are arranged on the inner wall (but not limited to the inner wall) of the flow channel are used for acquiring, analyzing and converting in real time to obtain n pressure values and m flow velocity values of the inner wall of the flow channel, and then the harmonic average values of the pressure values and the flow velocity values at different longitudinal sections are calculated.
5) And (3) repeating the step 3), stepping and increasing the inlet pressure of the labyrinth disc pressure reducing valve for multiple times until the inlet pressure reaches 14.7MPa, then obtaining n pressure values, m flow velocity values and harmonic mean values thereof again by utilizing the step 4), and respectively drawing discrete curves of the harmonic mean values at different sections along with the change of the inlet pressure of the labyrinth disc pressure reducing valve.
6) And for different sections of the labyrinth disc pressure reducing valve, calculating the energy dissipation value of the adjacent section by using the following formula to obtain the energy dissipation performance, and drawing an energy dissipation map corresponding to the inlet pressure of the different discrete labyrinth disc pressure reducing valves.
The specific implementation can obtain the internal pressure reduction flowing state of the current labyrinth disc pressure reducing valve by comparing the actually obtained pressure value and flow velocity value according to the energy dissipation map.
Claims (8)
1. A labyrinth disk pressure reducing valve is characterized in that: the labyrinth disc pressure reducing valve comprises a valve body (1), a valve seat (2), a labyrinth disc sleeve (3), a valve cover (7), a valve rod (13), a valve core (18), a throttling orifice plate (19) and a valve rod position regulator (21); the top of the valve body (1) is provided with a circular opening, a valve cover (7) is installed in the circular opening, a central through hole is formed in the valve cover (7) in the vertical direction, an upper cavity and a lower cavity are formed in the valve body, the end parts of the two sides of the valve body are provided with a horizontal medium inlet (22) and a horizontal medium outlet (23), the medium inlet (22) is communicated with the upper cavity of the valve body (1), and the medium outlet (23) is communicated with the lower cavity of the valve body (1); the upper cavity and the lower cavity are connected through a through hole, a valve seat (2) is arranged at the through hole, a labyrinth disc sleeve (3) is arranged on the valve seat, and the lower part of the valve cover (7) is in interference fit with the upper part of the labyrinth disc sleeve (3);
the valve cover (7) and the labyrinth disc sleeve (3) are both provided with central through holes, and the valve cover (7) and the central through holes of the labyrinth disc sleeve (3) are coaxially and vertically communicated; the valve seat (2) is mainly coaxially formed by an upper cylinder and a lower cylinder, the diameter of the upper cylinder is larger than that of the lower cylinder, an inverted cone inner cavity is formed in the center of the upper cylinder, a cylindrical inner cavity is formed in the lower cylinder, a throttling pore plate (19) provided with a vertical throttling hole is arranged on the top end face of the inverted cone inner cavity, the inverted cone inner cavity is communicated with the bottom of a central through hole of the labyrinth disc sleeve (3) through the throttling pore plate (19), the inverted cone inner cavity is communicated with the cylindrical inner cavity, pore plates provided with horizontal partition throttling holes are uniformly distributed between the inverted cone inner cavity and the cylindrical inner cavity, a plurality of fluid outlet holes are uniformly distributed on the bottom end face of the cylindrical inner cavity, and the fluid outlet holes and; an annular groove is formed in the edge of the top surface of a cylinder at the upper part of the valve seat (2), an annular boss is arranged on the edge of the lower end face of the labyrinth disc sleeve (3), and the annular boss of the labyrinth disc sleeve (3) is embedded into the annular groove of the valve seat (2) to form connection matching; the middle part of the lower end surface of the labyrinth disc sleeve (3) is provided with an annular groove, and the throttle orifice plate (19) is embedded into the annular groove of the labyrinth disc sleeve (3); the valve rod (13) penetrates through a central through hole of the valve cover (7), the lower end of the valve rod (13) penetrates through the central through hole of the valve cover (7), the rear end part of the valve rod (13) is hinged with a cylindrical valve core (18), and the upper end of the valve rod (13) penetrates through the central through hole of the valve cover (7) and then is connected with a valve rod position regulator (21).
2. A labyrinth disk relief valve as claimed in claim 1, wherein: a plurality of layers of labyrinth discs (24) are distributed in the middle barrel of the labyrinth disc sleeve (3) from bottom to top, and a plurality of S-shaped horizontal labyrinth flow channels which are communicated in the radial direction are formed in the labyrinth discs (24).
3. A labyrinth disk relief valve as claimed in claim 2, wherein: the S-shaped horizontal labyrinth flow channel is a flow channel bent at a right angle and is divided into a plurality of sections of sub-flow channels according to the radial flow direction, the middle part of each section of sub-flow channel is provided with a cross section, and the inner wall of the cross section is provided with a plurality of pressure strain gauges and a plurality of flow meters along the circumference.
4. A labyrinth disk relief valve as claimed in claim 1, wherein: the lower end of the valve cover (7) is provided with an annular concave hole, the upper part of the labyrinth disc sleeve (3) is provided with an annular boss, and the annular boss is sleeved in the annular concave hole to form interference fit.
5. A labyrinth disk relief valve as claimed in claim 1, wherein: the valve core (18) is internally provided with one or more supporting radial plates (20) in the center, a circumferential groove is formed around the excircle of the middle upper part of the valve core (18), and an annular graphite strip (25) is embedded in the circumferential groove.
6. A labyrinth disk relief valve as claimed in claim 1, wherein: valve gap (7) periphery and valve body (1) circular opening between the annular clearance in from the bottom up be equipped with annular seal gasket (4) and annular clamping ring (5), valve gap (7) overcoat ring flange (14) of annular clamping ring (5) top, ring flange (14) are connected fixedly through valve gap flange (6) and valve body (1) circular opening's outer terminal surface, compress tightly annular seal gasket (4) and annular clamping ring (5) in the annular clearance, constitute sealedly.
7. A labyrinth disk relief valve as claimed in claim 1, wherein: the valve is characterized in that an annular packing bottom pad (12), a sealing packing (11), a packing gland (8) and a dust ring (10) are embedded into an annular gap between the periphery of the valve rod (13) and a central through hole of the valve cover (7) from bottom to top, a valve rod flange (9) is sleeved outside the valve rod (13) above the dust ring (10), and the valve rod flange (9) is fixedly connected with the outer end face of the central through hole of the valve cover (7) through a locking nut.
8. A labyrinth disk relief valve as claimed in claim 1, wherein: an annular retaining ring (15), an annular retaining ring (16) and a balance sealing ring (17) are sequentially arranged in an annular gap between the periphery of the top of a valve core (18) connected with a valve rod (13) and a central through hole of the labyrinth disc sleeve (3) from top to bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021710221.5U CN213145559U (en) | 2020-08-17 | 2020-08-17 | Labyrinth disc pressure reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021710221.5U CN213145559U (en) | 2020-08-17 | 2020-08-17 | Labyrinth disc pressure reducing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213145559U true CN213145559U (en) | 2021-05-07 |
Family
ID=75738576
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021710221.5U Expired - Fee Related CN213145559U (en) | 2020-08-17 | 2020-08-17 | Labyrinth disc pressure reducing valve |
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| CN (1) | CN213145559U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113202659A (en) * | 2021-05-08 | 2021-08-03 | 河南航天液压气动技术有限公司 | Armature component for small-flow miniature electromagnetic valve |
| CN113578551A (en) * | 2021-07-28 | 2021-11-02 | 山东理工大学 | Spray body for connecting two-way water valve and nozzle body thereof |
| CN113833872A (en) * | 2021-07-30 | 2021-12-24 | 西安西热节能技术有限公司 | Device and method for adjusting local flow velocity of pipeline |
| CN114251512A (en) * | 2021-12-08 | 2022-03-29 | 西安热工研究院有限公司 | Low pressure side sealed pre-opening type multi-stage pressure reducing device |
-
2020
- 2020-08-17 CN CN202021710221.5U patent/CN213145559U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113202659A (en) * | 2021-05-08 | 2021-08-03 | 河南航天液压气动技术有限公司 | Armature component for small-flow miniature electromagnetic valve |
| CN113202659B (en) * | 2021-05-08 | 2022-03-18 | 河南航天液压气动技术有限公司 | Armature component for small-flow miniature electromagnetic valve |
| CN113578551A (en) * | 2021-07-28 | 2021-11-02 | 山东理工大学 | Spray body for connecting two-way water valve and nozzle body thereof |
| CN113578551B (en) * | 2021-07-28 | 2022-09-27 | 山东理工大学 | Spray body for connecting two-way water valve and nozzle body thereof |
| CN113833872A (en) * | 2021-07-30 | 2021-12-24 | 西安西热节能技术有限公司 | Device and method for adjusting local flow velocity of pipeline |
| CN113833872B (en) * | 2021-07-30 | 2023-08-22 | 西安西热节能技术有限公司 | Device and method for adjusting local flow velocity of pipeline |
| CN114251512A (en) * | 2021-12-08 | 2022-03-29 | 西安热工研究院有限公司 | Low pressure side sealed pre-opening type multi-stage pressure reducing device |
| CN114251512B (en) * | 2021-12-08 | 2024-06-04 | 西安热工研究院有限公司 | Pre-opening type multistage pressure reducing device with low-pressure side seal |
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20210507 |