Integrated temperature and pressure reducing valve
By designing cone -shaped nozzles and spring pre -tightening nozzles in integrated temperature reduction and decompression valve, and the structure of multiple decompression sleeve sleeves is adopted, it solves the problem of large volume, poor pressure effect and noise in the existing technology. A compact, effective temperature reduction and decompression effect is achieved.
Patent Information
- Application Number
- CN202420045716.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-09
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-01-09
AI Technical Summary
The existing integrated temperature reduction and pressure reducing valves have problems such as large volume, poor pressure reduction effect, insufficient cooling effect of small flow reduction water, and high noise at the valve outlet.
Design an integrated temperature reduced pressure decompression valve of the valve body, valve seat, valve seat, stem, valve plug, and upper valve cover. A cone nozzle and spring pre -tightening nozzle is set on the valve plug. Stack, similar to the sound absorption board, eliminating noise.
The characteristics of compact structure, small volume, and temperature -degradation and decompression effect are realized. At the same time, the noise at the valve exit is eliminated. The temperature reducing effect of temperature -reducing water at high and low flow is better.
Smart Images
Figure CN222416080U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a valve for reducing the temperature and pressure of a medium, in particular to an integrated temperature-reducing and pressure-reducing valve. Background Art
[0002] The temperature-reducing and pressure-reducing valve is a device used in industrial production to reduce high-temperature and high-pressure steam to the required low-temperature and low-pressure steam. It is widely used in cogeneration, central heating (or steam supply), light industry, power, chemical industry, textile and other industries. The temperature-reducing and pressure-reducing valve controls the opening of the opening and closing parts in the valve body to adjust the flow of steam and reduce the pressure of steam. At the same time, cooling water is sprayed into the valve body or behind the valve to reduce the temperature of the steam. After the cooling water is mixed with the steam, the superheated steam is cooled and further reduced in pressure to obtain low-temperature and low-pressure steam that meets production requirements. In order to obtain a very effective steam-liquid two-phase mixing, an integrated temperature-reducing and pressure-reducing valve is usually used, that is, the temperature reduction and pressure reduction are integrated into one. The integrated temperature-reducing and pressure-reducing valve has also appeared in China. Due to the structural defects of the temperature-reducing sleeve and the nozzle, there are generally problems such as large volume, poor pressure reduction effect, insignificant temperature reduction effect of small flow rate cooling water, and large noise generated at the valve outlet. Utility Model Content
[0003] In order to solve the problems of large size, poor pressure reduction effect, unclear cooling effect of small flow cooling water and large noise generated at the valve outlet of the existing integrated temperature reduction and pressure reducing valve, the utility model provides an integrated temperature reduction and pressure reducing valve, which has the characteristics of compact structure, small size and good temperature reduction and pressure reduction effect, and at the same time eliminates the noise generated at the valve outlet.
[0004] The technical solution of the utility model is: an integrated temperature-reducing and pressure-reducing valve, comprising a valve body, a valve seat, a valve stem, a valve plug and an upper valve cover, the upper end of the valve body is connected to the upper valve cover, the side wall of the upper valve cover is connected to the temperature-reducing water pipe, the valve seat, the pressure-reducing sleeve and the upper sleeve are installed in the valve body from bottom to top in sequence, the valve plug can slide up and down between the valve seat and the upper sleeve, the upper end of the valve plug is connected to the actuator through the valve stem, the valve plug is cylindrical, the upper end of the valve plug is provided with a conical nozzle, the upper end of the conical nozzle is communicated with the inner cavity of the upper valve cover, and the lower end of the conical nozzle is communicated with the inner cavity of the valve plug; the lower end of the valve plug is provided with a spring pre-tightening nozzle, the lower end of the spring pre-tightening nozzle is located in the inner cavity of the pressure-reducing sleeve, and the pressure-reducing sleeves are multiple and stacked together.
[0005] The spring preloaded nozzle comprises a valve plug, a support sleeve, a preloaded valve core, a spring, a lower spring seat and an upper spring seat. The support sleeve is fixed in the valve plug. The support sleeve is provided with a water hole. The lower spring seat, spring and upper spring seat are sequentially installed in the support sleeve from bottom to top. The upper spring seat can slide up and down in the support sleeve. A nozzle hole is provided at the center of the bottom surface of the valve plug. The lower end of the preloaded valve core cooperates with the conical surface of the nozzle hole. The preloaded valve core passes through the nozzle hole, the support sleeve, the lower spring seat, the spring and the upper spring seat from bottom to top. An adjustable nut is provided at the upper end of the preloaded valve core.
[0006] There are five decompression sleeves, each of which has a sieve hole on its side wall, and connecting grooves on the outer walls of the four inner decompression sleeves.
[0007] The side wall of the valve body is connected to the air inlet pipe, the inner wall of the lower end of the valve body is in a bell-mouth shape, and the lower end of the valve body is connected to the air outlet pipe.
[0008] The inner wall of the valve seat is provided with a metal hard sealing layer, and the valve plug can be inserted into the valve seat and sealed with the metal hard sealing layer.
[0009] The upper end of the valve plug is connected to the actuator through a valve stem.
[0010] The utility model has the following beneficial effects: due to the adoption of the above technical scheme, a conical nozzle and a spring preloaded nozzle are arranged on the valve plug, the conical nozzle can meet the requirements of large flow conditions, the spring preloaded nozzle can improve the adjustable ratio of the nozzle, the atomization effect is good, the water droplets ejected by the cooling water are small, the injection speed is high, the penetration is strong, and the cooling effect of the cooling water at high and low flow rates is good. In order to obtain effective steam-liquid two-phase mixing, when working, the spring preloaded nozzle on the valve plug is located in the pressure reducing sleeve, and the periphery of the pressure reducing sleeve is the most disordered and turbulent area of steam flow, just like a mixer, which is the best position for installing the spring preloaded nozzle. The valve plug, the conical nozzle and the spring preloaded nozzle are integrated into one, the structure is compact, the cooling water can absorb the heat of the high-temperature steam faster and more fully, and the complete integration of cooling and pressure reduction is realized. At the same time, multiple pressure reducing sleeves are stacked, similar to sound absorbing panels, with good sound absorption effect, eliminating the noise generated at the valve outlet. Compared with the prior art, the utility model has the characteristics of compact structure, small volume and good cooling and pressure reduction effect, and eliminates the noise generated at the valve outlet. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a structural sectional view of the utility model.
[0012] Figure 2 It is an installation cross-sectional view of the spring preloaded nozzle 10 in the utility model.
[0013] Figure 3 It is a structural sectional view of the decompression sleeve 7 in the utility model.
[0014] Figure 4 It is a structural sectional view of the valve seat 2 in the utility model.
[0015] In the figure: 1-valve body, 2-valve seat, 3-valve stem, 4-valve plug, 5-upper valve cover, 6-cooling water pipe, 7-pressure reducing sleeve, 8-upper sleeve, 9-conical nozzle, 10-spring pre-tightening nozzle, 11-support sleeve, 12-pre-tightening valve core, 13-spring, 14-lower spring seat, 15-upper spring seat, 16-nozzle hole, 17-adjustable nut, 18-sieve hole, 19-connecting groove, 20-inlet pipe, 21-outlet pipe, 22-metal hard sealing layer, 23-actuator. DETAILED DESCRIPTION
[0016] The technical solution of the utility model is clearly and completely described below in conjunction with the accompanying drawings.
[0017] like Figures 1 to 4 As shown, an integrated temperature-reducing and pressure-reducing valve comprises a valve body 1, a valve seat 2, a valve stem 3, a valve plug 4 and an upper valve cover 5, the upper end of the valve body 1 is connected to the upper valve cover 5, the side wall of the upper valve cover 5 is connected to the temperature-reducing water pipe 6, the valve seat 2, the pressure-reducing sleeve 7 and the upper sleeve 8 are installed in the valve body 1 from bottom to top, the valve plug 4 can slide up and down between the valve seat 2 and the upper sleeve 8, the valve plug 4 is cylindrical, and a conical nozzle 9 is provided at the upper end of the valve plug 4, the upper end of the conical nozzle 9 is communicated with the inner cavity of the upper valve cover 5, and the lower end of the conical nozzle 9 is communicated with the inner cavity of the valve plug 4; the lower end of the valve plug 4 is provided with a spring preloaded nozzle 10, the lower end of the spring preloaded nozzle 10 is located in the inner cavity of the pressure-reducing sleeve 7, and the pressure-reducing sleeve 7 is multiple and stacked together. Due to the adoption of the above technical solution, a conical nozzle 9 and a spring preloaded nozzle 10 are provided on the valve plug 4. The conical nozzle 9 can meet the requirements of large flow conditions, and the spring preloaded nozzle 10 can improve the adjustable ratio of the nozzle, with good atomization effect. The water droplets ejected by the cooling water are small, the injection speed is high, and the penetration is strong. The cooling effect of the cooling water at high and low flow rates is good. In order to obtain effective steam-liquid two-phase mixing, when working, the spring preloaded nozzle 10 on the valve plug 4 is located in the pressure reducing sleeve 7. The periphery of the pressure reducing sleeve 7 is the most disordered and turbulent area of steam flow, just like a mixer, which is the best position to install the spring preloaded nozzle 10. The valve plug 4, the conical nozzle 9 and the spring preloaded nozzle 10 are integrated into one, with a compact structure. The cooling water can absorb the heat of the high-temperature steam faster and more fully, and the complete integration of cooling and pressure reduction is realized. At the same time, multiple pressure reducing sleeves 7 are stacked, similar to sound absorbing panels, with good sound absorption effect, eliminating the noise generated at the valve outlet. Compared with the prior art, the utility model has the characteristics of compact structure, small volume and good temperature and pressure reduction effect, and eliminates the noise generated at the valve outlet.
[0018] The spring preloaded nozzle 10 comprises a valve plug 4, a support sleeve 11, a preloaded valve core 12, a spring 13, a lower spring seat 14 and an upper spring seat 15. The support sleeve 11 is fixed in the valve plug 4, and a water hole is provided on the support sleeve 11. The lower spring seat 14, the spring 13 and the upper spring seat 15 are sequentially installed in the support sleeve 11 from bottom to top. The upper spring seat 15 can slide up and down in the support sleeve 11. A nozzle hole 16 is provided at the center of the bottom surface of the valve plug 4. The lower end of the preloaded valve core 12 is matched with the conical surface of the nozzle hole 16. The preloaded valve core 12 passes through the nozzle hole 16, the support sleeve 11, the lower spring seat 14, the spring 13 and the upper spring seat 15 from bottom to top. An adjustable nut 17 is provided at the upper end of the preloaded valve core 12. The preloaded force of the spring 13 can be adjusted by the adjustable nut 17, which improves the adjustable ratio and makes the injection flow rate of the spring preloaded nozzle 10 adjustable.
[0019] There are five decompression sleeves 7, each of which has a sieve hole 18 on its side wall, and the outer walls of the four inner decompression sleeves 7 are provided with a connecting groove 19. The connecting groove 19 is connected to the sieve holes 18 on the side walls of adjacent decompression sleeves 7 to allow steam to pass through.
[0020] The side wall of the valve body 1 is connected to the air inlet pipe 20, the inner wall of the lower end of the valve body 1 is in a bell-mouth shape, and the lower end of the valve body 1 is connected to the air outlet pipe 21. The structure of the valve body 1 is equivalent to a venturi tube. When the spring preloaded nozzle 10 sprays cooling water, a Bernoulli effect will occur in the area of the pressure reducing sleeve 7, so that the steam flow rate entering the inner cavity of the pressure reducing sleeve 7 is increased, and the high-flow steam quickly impacts the water droplets in the inner cavity of the pressure reducing sleeve 7, so that the steam and liquid phases are quickly mixed, and the water droplets evaporate quickly to achieve the purpose of steam cooling.
[0021] The inner wall of the valve seat 2 is provided with a metal hard sealing layer 22, and the valve plug 4 can be inserted into the valve seat 2 and sealed with the metal hard sealing layer 22. When the valve is closed, it has a good sealing effect.
[0022] The upper end of the valve plug 4 is connected to the actuator 23 through the valve stem 3. The actuator 23 drives the valve stem 3 to move up and down, so that the valve plug 4 can move up and down in the valve seat 2, the pressure reducing sleeve 7 and the upper sleeve 8, and the valve plug 4 can penetrate into the valve seat 2 to close the valve.
Claims
1. An integrated temperature-reducing and pressure-reducing valve, comprising a valve body (1), a valve seat (2), a valve stem (3), a valve plug (4) and an upper valve cover (5), wherein the upper end of the valve body (1) is connected to the upper valve cover (5), the side wall of the upper valve cover (5) is connected to a temperature-reducing water pipe (6), the valve seat (2), a pressure-reducing sleeve (7) and an upper sleeve (8) are sequentially installed in the valve body (1) from bottom to top, and the valve plug (4) can slide up and down between the valve seat (2) and the upper sleeve (8), and is characterized in that: The valve plug (4) is cylindrical in shape, and a conical nozzle (9) is provided at the upper end of the valve plug (4), and the upper end of the conical nozzle (9) is communicated with the inner cavity of the upper valve cover (5), and the lower end of the conical nozzle (9) is communicated with the inner cavity of the valve plug (4); a spring preloaded nozzle (10) is provided at the lower end of the valve plug (4), and the lower end of the spring preloaded nozzle (10) is located in the inner cavity of the pressure reducing sleeve (7), and the pressure reducing sleeve (7) is multiple and stacked together.
2. The integrated temperature and pressure reducing valve according to claim 1, characterized in that: The spring preloaded nozzle (10) comprises a valve plug (4), a support sleeve (11), a preloaded valve core (12), a spring (13), a lower spring seat (14) and an upper spring seat (15); the support sleeve (11) is fixed in the valve plug (4); the support sleeve (11) is provided with a water through hole; the lower spring seat (14), the spring (13) and the upper spring seat (15) are sequentially installed in the support sleeve (11) from bottom to top; the upper spring seat (15) can slide up and down in the support sleeve (11); a nozzle hole (16) is provided at the center of the bottom surface of the valve plug (4); the lower end of the preloaded valve core (12) cooperates with the conical surface of the nozzle hole (16); the preloaded valve core (12) passes through the nozzle hole (16), the support sleeve (11), the lower spring seat (14), the spring (13) and the upper spring seat (15) from bottom to top; and an adjustable nut (17) is provided at the upper end of the preloaded valve core (12).
3. The integrated temperature and pressure reducing valve according to claim 1, characterized in that: There are five decompression sleeves (7), each of which has a sieve hole (18) on its side wall, and the outer walls of the four decompression sleeves (7) located inside are provided with connecting grooves (19).
4. An integrated temperature and pressure reducing valve according to claim 1, 2 or 3, characterized in that: The side wall of the valve body (1) is connected to the air inlet pipe (20), the inner wall of the lower end of the valve body (1) is in a bell-mouth shape, and the lower end of the valve body (1) is connected to the air outlet pipe (21).
5. An integrated temperature and pressure reducing valve according to claim 1, 2 or 3, characterized in that: The inner wall of the valve seat (2) is provided with a metal hard sealing layer (22), and the valve plug (4) can be inserted into the valve seat (2) and sealed with the metal hard sealing layer (22).
6. An integrated temperature and pressure reducing valve according to claim 1, 2 or 3, characterized in that: The upper end of the valve plug (4) is connected to the actuator (23) via the valve stem (3).