CN216812866U - Multistage sealed pressure-regulating temperature-regulating steam valve - Google Patents
Multistage sealed pressure-regulating temperature-regulating steam valve Download PDFInfo
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- CN216812866U CN216812866U CN202220414109.XU CN202220414109U CN216812866U CN 216812866 U CN216812866 U CN 216812866U CN 202220414109 U CN202220414109 U CN 202220414109U CN 216812866 U CN216812866 U CN 216812866U
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Abstract
The utility model discloses a multistage sealed pressure-regulating and temperature-regulating steam valve which comprises a valve body and a valve cover, wherein a hollow cavity and a sleeve are arranged inside the valve body, the upper end and the lower end of the sleeve are in sealing fit with the upper inner wall and the lower inner wall of the hollow cavity, a valve rod is sleeved in the sleeve, a sleeve boss and a sleeve groove are arranged on the inner wall of the sleeve, a valve rod groove and a valve rod boss are arranged on the outer wall of the valve rod, when the valve is in a closed state, the sleeve groove and the valve rod boss are in limit sealing, when the valve is in an open state, the valve rod boss is in clearance fit with the sleeve groove, the valve rod groove is in clearance fit with the sleeve boss, the valve body is further connected with a branch pipe, and a steam cooling nozzle is bypassed on the branch pipe. The utility model can accurately reduce the steam pressure and temperature, realize multi-stage sealing and avoid cavitation erosion and blocking flow.
Description
Technical Field
The utility model relates to the technical field of valve manufacturing, in particular to a multistage sealed pressure-regulating and temperature-regulating steam valve.
Background
With the wide application of thermal power, chemical boilers and steam turbines, steam is often used for heating, heat tracing or directly participating in reaction. However, the steam boiler or the steam turbine generates steam with fixed pressure and fixed temperature, and several kinds of steam with different pressure and different temperature are often required in use, so that the pressure and the temperature of the generated steam need to be adjusted according to engineering sites to meet different use requirements.
Meanwhile, the medium is in a high-speed gas state during temperature and pressure adjustment, which is a typical cavitation working condition with high pressure difference and large flow, and cavitation erosion and erosion are easily generated on the adjusting element by the fluid. The temperature and pressure regulating device under the working condition has the characteristics of high regulation precision, large regulation range, noise reduction during regulation and stable and reliable operation.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art, and provides a multistage sealed pressure-regulating and temperature-regulating steam valve which can accurately reduce steam pressure and temperature, realize multistage sealing and avoid cavitation erosion and flow blockage.
In order to achieve the purpose, the utility model provides a multistage sealed pressure-regulating and temperature-regulating steam valve which comprises a valve body and a valve cover, wherein a hollow cavity and a sleeve are arranged inside the valve body, the upper end and the lower end of the sleeve are in sealing fit with the upper inner wall and the lower inner wall of the hollow cavity, a valve rod is sleeved in the sleeve, a sleeve boss and a sleeve groove are arranged on the inner wall of the sleeve, a valve rod groove and a valve rod boss are arranged on the outer wall of the valve rod, when the valve is in a closed state, the sleeve groove is in limiting seal with the valve rod boss, when the valve is in an open state, the valve rod boss is in clearance fit with the sleeve groove, the valve rod groove is in clearance fit with the sleeve boss, the valve body is further connected with a branch pipe, and a steam cooling nozzle is bypassed on the branch pipe.
The sleeve bosses and the sleeve grooves are annular and are sequentially arranged at intervals along the vertical direction; the valve rod groove and the valve rod boss are both annular and are arranged at intervals in sequence along the vertical direction.
The valve rod boss comprises a boss first plane and a boss second plane, the boss first plane is vertically arranged, the boss second plane is horizontally arranged, and when the valve is in a closed state, the boss second plane and the boss second plane are in limit sealing.
Further, an air inlet channel communicated with the hollow cavity is arranged on the side wall of the valve body, a sleeve air inlet is arranged on the side wall of the upper end of the sleeve, a sleeve air outlet is arranged at the lower end of the sleeve, a transition channel communicated with the sleeve air outlet is arranged in the valve body, the transition channel is connected with an air outlet channel in the branch pipe, and a throttling head in sealing fit with the sleeve air outlet is arranged at the lower end of the valve rod.
Furthermore, the transition channel comprises a uniform cross-section channel communicated with the sleeve gas outlet and a variable cross-section channel communicated with the gas outlet channel, the diameter of the uniform cross-section channel is larger than that of the gas outlet channel, the variable cross-section channel is conical, a noise reduction throttle plate is arranged at the joint of the variable cross-section channel and the gas outlet channel, and a plurality of throttle holes are formed in the noise reduction throttle plate.
Furthermore, the upper end of the valve cover is connected with a packing gland, the lower end of the packing gland is provided with a sealing filler and a packing seat ring in a pressing mode, the upper end of the valve rod sequentially penetrates through the valve cover and the packing gland and then is connected with an electric mechanism, and the electric mechanism is used for driving the valve rod to move axially.
Furthermore, the steam cooling nozzle comprises a nozzle body and a nozzle cover which are fixedly connected, a filter screen is arranged at the joint of the nozzle body and the nozzle cover, a cooling water guide pipe is sleeved in the nozzle body, the end part of the cooling water guide pipe extends out of the nozzle body and is inserted into the branch pipe, and an atomizing nozzle with the spraying direction consistent with the steam flowing direction is arranged at the end part of the cooling water guide pipe.
The utility model has the beneficial effects that:
1. the steam pressure and the temperature are accurately reduced, and the adjusting range is wide. The outer wall of the valve rod and the inner wall of the sleeve are provided with a plurality of annular bosses and annular grooves, when the valve is in an opening state, the valve rod bosses are in clearance fit with the sleeve grooves, the valve rod grooves are in clearance fit with the sleeve bosses, the cross-sectional area and the flow channel direction of the clearance between the sleeve and the valve rod are changed through the up-and-down movement of the valve rod, and a steam medium is compressed and expanded for multiple times when passing through the sleeve, so that the steam pressure can be greatly reduced, the pressure regulating range is large, the size of the clearance between the sleeve and the valve rod can be controlled by controlling the stroke of the valve rod, and the pressure after pressure reduction is accurately controlled; the low-temperature water mist sprayed out through the steam cooling nozzle flows into the high-temperature steam to absorb heat and vaporize, so that the temperature of the high-temperature steam is neutralized, and the temperature of the steam can be accurately controlled by controlling the flow of the sprayed low-temperature water mist.
2. Cavitation and choking phenomena are avoided. The sleeve boss and the sleeve groove are both rings which are arranged at intervals in sequence, and the valve rod groove and the valve rod boss are both rings which are arranged at intervals in sequence.
3. The valve has good sealing effect and reduces noise. When the valve is in a closed state, the plurality of sleeve grooves and the plurality of valve rod bosses are in limit sealing, and the throttling head at the bottom of the valve rod is in sealing fit with the sleeve gas outlet to form axial multi-stage sealing, so that untight closing is avoided; the noise reduction orifice plate is arranged at the variable cross-section passage to avoid noise and vibration caused by sudden volume change.
Drawings
Fig. 1 is a front sectional view of the present invention.
Fig. 2 is a perspective view of the sleeve.
Fig. 3 is a partial cross-sectional view of the lower portion of the valve stem.
The components in the figures are numbered as follows: 1-valve body, 2-leakage-proof gasket, 3-valve rod, 4-sleeve, 5-leakage-proof gasket, 6-valve cover, 7-packing seat ring, 8-sealing packing, 9-packing gland, 10-noise reduction orifice plate, 11-nozzle cover, 12-filter screen, 13-branch pipe, 14-cooling water guide pipe, 15-nozzle body, 16-atomizing nozzle, 17-hollow cavity, 18-air inlet channel, 19-transition channel, 20-variable cross-section channel, 21-air outlet channel, 22-electric mechanism, 23-sleeve air inlet, 24-sleeve air outlet, 25-sleeve boss, 26-sleeve groove, 27-valve rod groove, 28-valve rod boss, 29-groove first plane, 30-groove second plane, 31-boss first plane, 32-boss second plane, and 33-throttle head.
Detailed Description
The following detailed description is provided to further explain the claimed embodiments of the present invention and to enable those skilled in the art to more clearly understand the claims. The scope of the utility model is not limited to the following specific examples. It is intended that the scope of the utility model be determined by those skilled in the art from the following detailed description, which includes claims that are directed to this invention.
As shown in fig. 1-3, a multistage sealed pressure-regulating and temperature-regulating steam valve, including valve body 1 and valve gap 6, the inside of valve body 1 is equipped with cavity 17 and sleeve 4, the upper and lower both ends of sleeve 4 and the upper and lower inner wall sealing fit of cavity 17, the cover is equipped with valve rod 3 in the sleeve 4, be equipped with sleeve boss 25 and sleeve recess 26 on the inner wall of sleeve 4, be equipped with valve rod recess 27 and valve rod boss 28 on the outer wall of valve rod 3, when the valve is in the closed condition, sleeve recess 26 and the spacing of valve rod boss 28 are sealed, when the valve is in the open condition, valve rod boss 28 and sleeve recess 26 clearance fit, valve rod recess 27 and sleeve boss 25 clearance fit, valve body 1 still is connected with branch pipe 13, valve body 1 and branch pipe 13 are integrated into one piece's overall structure, the bypass has steam cooling nozzle on branch pipe 13. Therefore, the cross sectional area of the gap between the sleeve and the valve rod and the direction of the flow channel are changed through the up-and-down movement of the valve rod, so that the steam medium is compressed and expanded for multiple times when flowing through the sleeve, the steam pressure can be greatly reduced, the pressure regulating range is large, the size of the gap between the sleeve and the valve rod can be controlled through controlling the stroke of the valve rod, and the pressure after pressure reduction is accurately controlled; the low-temperature water mist sprayed out through the steam cooling nozzle flows into the high-temperature steam to absorb heat and vaporize, so that the temperature of the high-temperature steam is neutralized, and the temperature of the steam can be accurately controlled by controlling the flow of the sprayed low-temperature water mist.
Be equipped with the inlet channel 18 with cavity 17 intercommunication on the lateral wall of valve body 1, be equipped with sleeve air inlet 23 on the upper end lateral wall of sleeve 4, the sleeve 4 lower extreme is equipped with sleeve gas outlet 24, the inside transition passageway 19 that communicates with sleeve gas outlet 24 that is equipped with of valve body 1, transition passageway 19 is connected with the passageway 21 of giving vent to anger in the branch pipe 13, valve rod 3 lower extreme is equipped with the throttle head 33 with sleeve gas outlet 24 seal fit. The hollow cavity can avoid blockage or jamming caused by impurities contained in the fluid. Under the condition of not reducing the circulation capacity, the reliability is improved, the opening speed of the valve is accelerated, and meanwhile, the hollow cavity is favorable for balancing the pressure of media in a high-pressure area of the air inlet channel and a low-pressure area of the air outlet channel and the uniformity of the temperature of the media in the valve.
The transition channel 19 comprises a uniform cross-section channel communicated with the sleeve air outlet 24 and a variable cross-section channel 20 communicated with the air outlet channel 21, the diameter of the uniform cross-section channel is larger than that of the air outlet channel 21, the variable cross-section channel 20 is conical, so that the medium pressure of the air outlet channel is further reduced, a noise reduction throttle plate 10 is arranged at the joint of the variable cross-section channel 20 and the air outlet channel 21, and a plurality of throttle holes are formed in the noise reduction throttle plate 10.
The sleeve bosses 25 and the sleeve grooves 26 are annular and are sequentially arranged at intervals along the vertical direction; the valve rod groove 27 and the valve rod boss 28 are both annular and are arranged at intervals in sequence along the vertical direction. The sleeve groove 26 comprises a vertically arranged groove first plane 29 and a horizontally arranged groove second plane 30, the valve rod boss 28 comprises a vertically arranged boss first plane 31 and a horizontally arranged boss second plane 32, when the valve is in a closed state, the groove second plane 30 and the boss second plane 32 are in limit sealing, and when the valve is in an open state, the groove second plane 30 and the boss second plane 32 are in clearance fit. The outer wall structure of valve rod inlays with telescopic inner wall structure like this, and the medium mainly is circulation, axial compressor and runoff when through the sleeve inside, can not take place vortex, reposition of redundant personnel and confluence, and power loss is less, but the structure of valve rod is fairly simple, and the manufacturing of being convenient for, and all can realize multistage sealed and multistage step-down.
The upper end of the valve cover 6 is connected with a packing gland 9, the lower end of the packing gland 9 is provided with a sealing packing 8 and a packing seat ring 7 in a pressing way, and the sealing packing and the packing gland are arranged in the valve cover to prevent a medium from flowing out. The upper end of the valve rod 3 sequentially penetrates through the valve cover 6 and the packing gland 9 and then is connected with the electric mechanism 22, and the electric mechanism 22 is used for driving the valve rod 3 to move axially, so that the size of a gap between the valve rod and the sleeve is controlled, and the medium pressure of the air outlet channel is further controlled.
Steam cooling nozzle includes fixed connection's nozzle body 15 and nozzle cover 11, nozzle cover 11 is connected with outside cooling water piping, be used for carrying cooling water for steam cooling nozzle, nozzle body 15 is equipped with filter screen 12 with nozzle cover 11's junction, nozzle body 15 endotheca has cooling water honeycomb duct 14, cooling water honeycomb duct 14's tip stretches out nozzle body 15 and is located outlet channel 21's radial middle part, cooling water honeycomb duct 14's tip is equipped with the atomizing nozzle 16 that the blowout direction is unanimous with the steam flow direction, the washing away of cooling water to the branch pipe inner wall has been avoided. Therefore, the low-temperature liquid cooling water is sprayed into the high-temperature steam through the atomizing nozzle and is quickly vaporized into steam, so that the mixed steam is neutralized in temperature, and the steam temperature is reduced.
Claims (7)
1. The utility model provides a multistage sealed pressure regulating steam valve that adjusts temperature which characterized in that: comprises a valve body (1) and a valve cover (6), a hollow cavity (17) and a sleeve (4) are arranged inside the valve body (1), the upper end and the lower end of the sleeve (4) are in sealing fit with the upper inner wall and the lower inner wall of the hollow cavity (17), the valve rod (3) is sleeved in the sleeve (4), a sleeve boss (25) and a sleeve groove (26) are arranged on the inner wall of the sleeve (4), a valve rod groove (27) and a valve rod boss (28) are arranged on the outer wall of the valve rod (3), when the valve is in a closed state, the sleeve groove (26) and the valve rod boss (28) are in limit sealing, when the valve is in an open state, the valve rod boss (28) is in clearance fit with the sleeve groove (26), valve rod recess (27) with sleeve boss (25) clearance fit, valve body (1) still is connected with branch pipe (13), branch pipe (13) go up the bypass has steam cooling nozzle.
2. The multi-stage sealed pressure-regulating and temperature-regulating steam valve of claim 1, wherein: the sleeve bosses (25) and the sleeve grooves (26) are annular and are sequentially arranged at intervals in the vertical direction; the valve rod groove (27) and the valve rod boss (28) are annular and are arranged at intervals in sequence in the vertical direction.
3. The multi-stage sealed pressure-regulating and temperature-regulating steam valve according to claim 2, characterized in that: the sleeve groove (26) comprises a vertically arranged groove first plane (29) and a horizontally arranged groove second plane (30), the valve rod boss (28) comprises a vertically arranged boss first plane (31) and a horizontally arranged boss second plane (32), and when the valve is in a closed state, the groove second plane (30) and the boss second plane (32) are in limit sealing.
4. The multi-stage sealed pressure-regulating and temperature-regulating steam valve of claim 1, wherein: be equipped with on the lateral wall of valve body (1) inlet channel (18) with cavity (17) intercommunication, be equipped with sleeve air inlet (23) on the upper end lateral wall of sleeve (4), sleeve (4) lower extreme is equipped with sleeve gas outlet (24), valve body (1) inside is equipped with transition passageway (19) with sleeve gas outlet (24) intercommunication, transition passageway (19) are connected with air outlet channel (21) in branch pipe (13), valve rod (3) lower extreme is equipped with and seals complex throttle head (33) with sleeve gas outlet (24).
5. The multi-stage sealed pressure-regulating and temperature-regulating steam valve according to claim 4, wherein: the transition channel (19) comprises a uniform cross-section channel communicated with the sleeve air outlet (24) and a variable cross-section channel (20) communicated with the air outlet channel (21), the diameter of the uniform cross-section channel is larger than that of the air outlet channel (21), the variable cross-section channel (20) is conical, a noise reduction throttle plate (10) is arranged at the joint of the variable cross-section channel (20) and the air outlet channel (21), and a plurality of throttle holes are formed in the noise reduction throttle plate (10).
6. The multi-stage sealed pressure-regulating and temperature-regulating steam valve of claim 1, wherein: valve gap (6) upper end is connected with gland (9), gland (9) lower extreme pressfitting is equipped with sealed packing (8) and packing seat circle (7), the upper end of valve rod (3) is passed valve gap (6) and gland (9) in proper order and is connected with electric mechanism (22), electric mechanism (22) are used for driving valve rod (3) axial motion.
7. The multi-stage sealed pressure-regulating and temperature-regulating steam valve of claim 1, wherein: the steam cooling nozzle comprises a nozzle body (15) and a nozzle cover (11) which are fixedly connected, a filter screen (12) is arranged at the joint of the nozzle body (15) and the nozzle cover (11), a cooling water guide pipe (14) is sleeved in the nozzle body (15), the end part of the cooling water guide pipe (14) extends out of the nozzle body (15) and is inserted into the branch pipe (13), and an atomizing nozzle (16) with the spraying direction consistent with the steam flowing direction is arranged at the end part of the cooling water guide pipe (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220414109.XU CN216812866U (en) | 2022-02-28 | 2022-02-28 | Multistage sealed pressure-regulating temperature-regulating steam valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220414109.XU CN216812866U (en) | 2022-02-28 | 2022-02-28 | Multistage sealed pressure-regulating temperature-regulating steam valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216812866U true CN216812866U (en) | 2022-06-24 |
Family
ID=82044382
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220414109.XU Active CN216812866U (en) | 2022-02-28 | 2022-02-28 | Multistage sealed pressure-regulating temperature-regulating steam valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216812866U (en) |
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2022
- 2022-02-28 CN CN202220414109.XU patent/CN216812866U/en active Active
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