Temperature and pressure reducer provided with rapid limiting structure and convenient to install

Abstract

The invention relates to the technical field of temperature and pressure reduction, and provides a temperature and pressure reducer provided with a rapid limiting structure and convenient to install, which comprises a valve body, a temperature and pressure reducing mechanism, a temperature and pressure reducing mechanism, a pressure reducing mechanism and a pressure reducing mechanism, and is characterized in that the valve body comprises a main valve module and a pilot valve module; the main valve clack rotates and moves up and down according to the pressure, the number of the throttling holes facing the steam inlet is changed, the size of the throttling holes facing the steam inlet is adjusted, and output steam is more stable and more accurate; desuperheating water is input into the main valve clack through the flow guide pipe through the booster pump and sprayed into high-pressure steam flowing in from the steam inlet through the spray head, so that the desuperheating water and the high-pressure steam are mixed more evenly, and the atomization effect is improved. The sliding sleeve is driven by the main valve clack to move downwards, the nozzle area of the spray head is reduced, and therefore the amount of attemperation water is rapidly reduced, rapid limiting is achieved, and the situation that due to excessive attemperation water, evaporation is incomplete, temperature adjustment is inaccurate, and the attemperation effect is affected is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of temperature reduction and pressure reduction, in particular to a temperature reduction and pressure reduction device with a quick limiting structure and convenient installation. Background Art

[0002] In modern industry, there are a large number of equipment that need to use steam, such as large industrial steam boilers or steam turbines. The steam used by these equipment is generally produced by boilers. However, the steam produced by boilers cannot be directly supplied to these equipment due to its high temperature and pressure. It needs to be adjusted in temperature and pressure by cooling and pressure reducing equipment before it can be used.

[0003] Existing temperature and pressure reducers generally use regulating valves to control the flow rate of water vapor and thus the pressure of water vapor, and then spray cooling water on the water vapor to reduce the temperature of the water vapor, thereby achieving the effect of reducing the temperature and pressure of the water vapor. However, the following problems still exist during use:

[0004] 1. The structure of some temperature and pressure reducers is relatively complex, including multiple components and pipelines, and the pressure reducing and temperature reducing components are separated, which increases the difficulty of equipment installation and also increases the occupied space;

[0005] 2. Most existing pressure regulating valves use conical valve discs to control the flow rate by controlling the gap between the valve disc and the valve seat. However, the opening and closing degree between the valve disc and the valve seat is too large, making it impossible to perform more precise pressure regulation.

[0006] 3. When the steam flow and pressure fluctuate greatly, the cooling water may not be completely evaporated, and the cooling water remaining at the steam outlet may not be eliminated, which will affect the cooling effect. Summary of the invention

[0007] The present invention provides a temperature and pressure reducing device with a quick limiting structure and convenient installation, which solves the problems of large equipment space occupation and low precision in the prior art by reducing components, increasing adjustment accuracy and quick limiting.

[0008] The technical solution of the present invention is as follows:

[0009] A temperature and pressure reducing device with a quick limit structure and convenient installation, comprising: a valve body, the valve body comprising a main valve module and a pilot valve module, and a temperature reducing mechanism installed on the valve body;

[0010] The main valve module comprises a main valve body, a steam inlet and a steam outlet are arranged on both sides of the main valve body, an upper cavity and a lower cavity are arranged in the center of the main valve body, the upper cavity and the lower cavity are respectively connected with the steam inlet and the steam outlet, the upper cavity and the lower cavity are connected and slidably connected with a main valve flap, the main valve flap is a hollow cylinder, and throttle holes from small to large are arranged around the main valve flap, and a part is left without throttle holes, one end of the main valve flap close to the bottom of the lower cavity is open, the bottom of the lower cavity is rotatably connected with a turntable, and a main valve spring is installed between the main valve flap and the turntable;

[0011] The temperature reduction mechanism comprises a flow guide pipe, a nozzle is installed at the output end of the flow guide pipe, and the nozzle is located in the main valve disc.

[0012] Preferably, a first steam guide hole and a second steam guide hole are respectively provided on the main valve body and located at the steam inlet and the steam outlet.

[0013] Preferably, the pilot valve module includes a pilot valve body, which is a hollow square body with an opening at the upper end. A piston is slidably connected to the pilot valve body, and a main valve core is slidably connected to the center of the piston. The main valve core is hollow, and the main valve core is fixedly connected to the main valve disc. Two sealing plates are fixedly connected to the top of the pilot valve body, and the sealing plates are hollow circles. A swivel sleeve is rotatably connected between the two sealing plates, and the swivel sleeve is slidably connected to the main valve core. A hollow tube is fixedly connected to the sealing plate away from the piston.

[0014] Preferably, four pillars are fixedly connected to the edge of the guide valve body, a fixing plate is fixedly connected to the pillar, a hollow column is fixedly connected to the center of the fixing plate, a threaded sleeve is slidably connected to the top of the hollow column, an adjusting bolt is connected to the inner thread of the threaded sleeve, an adjusting knob fixedly connected to the adjusting bolt is rotatably connected to the hollow column, a slide plate is fixedly connected to one end of the threaded sleeve, a guide valve diaphragm is slidably connected to the center of the hollow column, an adjusting spring is installed between the guide valve diaphragm and the slide plate, one end of the guide valve diaphragm close to the bottom of the hollow column is fixedly connected to a guide valve core, and one end of the guide valve core is fixedly connected to a guide valve flap.

[0015] Preferably, a steam guide pipe 1 is fixedly connected between the steam guide hole 2 and the hollow column, and two ends of the steam guide pipe 1 are respectively connected to the steam guide hole 2 and the hollow column, the connection point between the steam guide pipe 1 and the hollow column is located between the pilot valve diaphragm and the slide plate, a steam guide pipe 2 is fixedly connected between the pilot valve body and the hollow column, and two ends of the steam guide pipe 2 are respectively connected to the pilot valve body and the hollow column, the connection point between the steam guide pipe 2 and the hollow column is located on one side of the pilot valve flap, the connection point between the steam guide pipe 2 and the pilot valve body is located between the two sealing plates, a steam guide pipe 3 is fixedly connected between the steam guide hole 1 and the steam guide pipe 2, and two ends of the steam guide pipe 3 are respectively connected to the steam guide hole 1 and the steam guide pipe 2, a steam guide pipe 4 is fixedly connected between the pilot valve flap and the steam guide pipe 1, and two ends of the steam guide pipe 4 are respectively connected to the pilot valve flap and the steam guide pipe 1, and the connection point between the steam guide pipe 4 and the pilot valve flap is located between the two sealing plates.

[0016] Preferably, a fixing block is fixedly connected between the two sealing plates and located on one side of the steam guide pipe 2, a baffle is fixedly connected on the rotating sleeve and located on the other side of the steam guide pipe 2, a square hole 1 is opened on the sealing plate close to the piston, and a limiting block 1 and a limiting block 2 are fixedly connected, the limiting block 1 is located on one side of the square hole 1 close to the fixing block, the limiting block 2 is located on one side of the baffle close to the fixing block, an arc-shaped slide groove is opened on the sealing plate close to the piston and between the fixing block and the limiting block 1, a connecting strip is fixedly connected between the limiting block 1 and the limiting block 2, the limiting block 2 is located at the connection point between the steam guide pipe 4 and the guide valve disc, a spring is fixedly connected between the limiting block 1 and the fixing block, a square hole 2 is opened on the sealing plate close to the piston and located between the limiting block 2 and the limiting block 2, an oblique square block is fixedly connected on the piston, the oblique square block matches the square hole 2, and the inclined surface matches the limiting block 2.

[0017] Preferably, the temperature reduction mechanism includes a booster pump and a control valve, the booster pump is installed on one side of the guide valve core, the booster pump is connected to the guide pipe, and is connected to the main valve disc through a hollow pipe and the main valve core, the control valve is installed on the guide pipe and is located on one side of the booster pump, and a sliding sleeve is slidably connected to the nozzle, and one end of the sliding sleeve is fixedly connected to the main valve disc.

[0018] Preferably, a pressure gauge and a temperature gauge are installed on the main valve body and at the steam outlet.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The present invention provides throttle holes that change from large to small on the main valve disc, so that the pressure regulation accuracy is finer and more accurate, and the main valve disc is rotated and moved up and down according to the pressure, so as to change the number of throttle holes facing the steam inlet and adjust the size of the throttle holes facing the steam inlet, so that the steam after output is more stable and more accurate.

[0021] 2. The present invention pushes the main valve disc upwards through the main valve spring, and the initial state of the main valve disc is that the side without the throttle hole faces the steam inlet. Therefore, when the steam just flows in from the steam inlet, it does not pass through the main valve disc into the steam outlet. The pressure of the steam is balanced with the pressure of the main valve spring, so that the main valve disc is in a stable state, which is convenient for rapid limiting when the throttle hole is opened later, thereby achieving rapid pressure reduction.

[0022] 3. The present invention inputs cooling water into the main valve disc through the guide pipe by means of a booster pump, and sprays it on the high-pressure steam flowing in from the steam inlet through the nozzle. Since the high-pressure steam flowing in from the steam inlet has a relatively high pressure and temperature, the cooling water and the high-pressure steam are mixed more evenly and the atomization effect is improved; and when the main valve disc descends, the main valve disc drives the sliding sleeve to move downward, reducing the nozzle area of ​​the nozzle, thereby quickly reducing the amount of cooling water, realizing rapid limiting, and preventing excessive cooling water from evaporating incompletely, resulting in inaccurate temperature adjustment and affecting the cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a stereogram of the front side of the present invention;

[0024] Figure 2 It is a three-dimensional view of the back side of the present invention;

[0025] Figure 3 is a cross-sectional perspective view of the present invention;

[0026] Figure 4 The present invention Figure 3 A partial enlarged view of middle A;

[0027] Figure 5 The present invention Figure 3 A partial enlarged view of B in the middle;

[0028] Figure 6 The present invention Figure 3 A partial enlarged view of middle C;

[0029] Figure 7 is a three-dimensional view of the interior of the pilot valve body of the present invention;

[0030] Figure 8 The present invention Figure 7 A partial enlarged view of D in the middle;

[0031] Fig. 9 It is a cross-sectional perspective view of the pilot valve body of the present invention.

[0032] In the figure:

[0033] 1. Valve body; 2. Main valve module; 21. Main valve body; 22. Steam inlet; 23. Steam outlet; 24. Upper chamber; 25. Lower chamber; 26. Main valve disc; 27. Throttle hole; 28. Turntable; 29. ​​Main valve spring; 210. Steam guide hole 1; 211. Steam guide hole 2; 212. Pressure gauge; 213. Temperature gauge; 3. Pilot valve module; 31. Pilot valve body; 32. Piston; 33. Main valve core; 34. Sealing plate; 35. Rotating sleeve; 36. Hollow pipe; 37. Pillar; 38. Fixed plate; 39. Hollow column; 310. Threaded sleeve; 311. Adjusting bolt; 312. Adjusting knob; 313. Slide plate; 314. Pilot valve diaphragm ; 315, adjusting spring; 316, pilot valve core; 317, pilot valve flap; 318, steam pipe one; 319, steam pipe two; 320, steam pipe three; 321, steam pipe four; 322, fixing block; 323, baffle; 324, square hole one; 325, limit block one; 326, limit block two; 327, arc-shaped slide; 328, block one; 329, block two; 330, connecting strip; 331, spring; 332, square hole two; 333, oblique square block; 334, control chamber one; 335, control chamber two; 4, cooling mechanism; 41, guide pipe; 42, nozzle; 43, booster pump; 44, control valve; 45, sleeve. DETAILED DESCRIPTION

[0034] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0035] like Figure 1-9 As shown, the present invention provides a temperature and pressure reducing device with a quick limit structure and convenient installation, comprising: a valve body 1, the valve body 1 comprising a main valve module 2 and a pilot valve module 3, and a temperature reducing mechanism 4 is installed on the valve body 1;

[0036] The main valve module 2 comprises a main valve body 21, a steam inlet 22 and a steam outlet 23 are arranged on both sides of the main valve body 21, an upper chamber 24 and a lower chamber 25 are arranged in the center of the main valve body 21, the upper chamber 24 and the lower chamber 25 are respectively connected with the steam inlet 22 and the steam outlet 23, the upper chamber 24 and the lower chamber 25 are connected and slidably connected with a main valve flap 26, the main valve flap 26 is a hollow cylinder, and throttle holes 27 from small to large are arranged around the main valve flap 26, and a part is left without the throttle hole 27, the main valve flap 26 is open at one end close to the bottom of the lower chamber 25, the bottom of the lower chamber 25 is rotatably connected with a turntable 28, and a main valve spring 29 is installed between the main valve flap 26 and the turntable 28;

[0037] The temperature reduction mechanism 4 includes a flow guide pipe 41 , and a nozzle 42 is installed at the output end of the flow guide pipe 41 . The nozzle 42 is located in the main valve flap 26 .

[0038] As an embodiment of the present invention, a steam guide hole 1 210 and a steam guide hole 211 are respectively provided on the main valve body 21 at the steam inlet 22 and the steam outlet 23 .

[0039] As an embodiment of the present invention, the pilot valve module 3 includes a pilot valve body 31, which is a hollow square body with an open upper end. A piston 32 is slidably connected inside the pilot valve body 31, and a main valve core 33 is slidably connected to the center of the piston 32. The main valve core 33 is hollow, and the main valve core 33 is fixedly connected to the main valve flap 26. Two sealing plates 34 are fixedly connected to the top of the pilot valve body 31. The sealing plates 34 are hollow circles. A swivel sleeve 35 is rotatably connected between the two sealing plates 34. The swivel sleeve 35 is slidably connected to the main valve core 33, and a hollow tube 36 is fixedly connected to the sealing plate 34 away from the piston 32.

[0040] As an embodiment of the present invention, four pillars 37 are fixedly connected to the edge of the guide valve body 31, a fixing plate 38 is fixedly connected to the pillar 37, a hollow column 39 is fixedly connected to the center of the fixing plate 38, a threaded sleeve 310 is slidably connected to the top of the hollow column 39, an adjusting bolt 311 is internally threadedly connected to the threaded sleeve 310, an adjusting knob 312 fixedly connected to the adjusting bolt 311 is rotatably connected to the hollow column 39, a slide plate 313 is fixedly connected to one end of the threaded sleeve 310, a guide valve diaphragm 314 is slidably connected to the center of the hollow column 39, an adjusting spring 315 is installed between the guide valve diaphragm 314 and the slide plate 313, a guide valve core 316 is fixedly connected to one end of the guide valve diaphragm 314 near the bottom of the hollow column 39, and a guide valve flap 317 is fixedly connected to one end of the guide valve core 316.

[0041] As an embodiment of the present invention, a steam guide pipe 1 318 is fixedly connected between the steam guide hole 211 and the hollow column 39, and the two ends of the steam guide pipe 1 318 are respectively connected to the steam guide hole 211 and the hollow column 39, and the connection between the steam guide pipe 1 318 and the hollow column 39 is located between the pilot valve diaphragm 314 and the slide plate 313, and a steam guide pipe 2 319 is fixedly connected between the pilot valve body 31 and the hollow column 39, and the two ends of the steam guide pipe 2 319 are respectively connected to the pilot valve body 31 and the hollow column 39, and the connection between the steam guide pipe 2 319 and the hollow column 39 is located between the pilot valve flap 314 and the slide plate 313. On one side of the steam guide pipe 7, the connection between the second steam guide pipe 319 and the pilot valve body 31 is located between the two sealing plates 34, the third steam guide pipe 320 is fixedly connected between the steam guide hole 1 210 and the second steam guide pipe 319, and the two ends of the third steam guide pipe 320 are respectively connected with the steam guide hole 1 210 and the second steam guide pipe 319, the fourth steam guide pipe 321 is fixedly connected between the pilot valve flap 317 and the steam guide pipe 1 318, and the two ends of the fourth steam guide pipe 321 are respectively connected with the pilot valve flap 317 and the steam guide pipe 1 318, and the connection between the fourth steam guide pipe 321 and the pilot valve flap 317 is located between the two sealing plates 34.

[0042] As an embodiment of the present invention, a fixed block 322 is fixedly connected between the two sealing plates 34 and located on one side of the steam guide pipe 319, a baffle 323 is fixedly connected on the rotating sleeve 35 and located on the other side of the steam guide pipe 319, a square hole 324 is opened on the sealing plate 34 close to the piston 32, and a limiting block 325 and a limiting block 326 are fixedly connected, the limiting block 325 is located on the side of the square hole 324 close to the fixed block 322, the limiting block 326 is located on the side of the baffle 323 close to the fixed block 322, and the sealing plate 34 close to the piston 32 and located between the fixed block 322 and the limiting block 325 is opened. An arc-shaped slide groove 327 is provided, and a block 1 328 and a block 2 329 are slidably connected to the arc-shaped slide groove 327, a connecting strip 330 is fixedly connected between the block 1 328 and the block 2 329, the block 2 329 is located at the connection point between the steam guide pipe 4 321 and the guide valve flap 317, a spring 331 is fixedly connected between the block 1 328 and the fixed block 322, a square hole 2 332 is provided on the sealing plate 34 close to the piston 32 and between the block 2 329 and the limit block 2 326, an oblique square block 333 is fixedly connected to the piston 32, the oblique square block 333 matches the square hole 2 332, and the inclined surface matches the block 2 329.

[0043] As an embodiment of the present invention, the cooling mechanism 4 includes a boosting pump 43 and a control valve 44. The boosting pump 43 is installed on one side of the guide valve core 316. The boosting pump 43 is connected to the guide pipe 41, and is connected to the main valve flap 26 through the hollow pipe 36 and the main valve core 33. The control valve 44 is installed on the guide pipe 41 and is located on one side of the boosting pump 43. A sliding sleeve 45 is slidably connected to the nozzle 42, and one end of the sliding sleeve 45 is fixedly connected to the main valve flap 26.

[0044] As an embodiment of the present invention, a pressure gauge 212 and a temperature gauge 213 are installed on the main valve body 21 and located at the steam outlet 23 .

[0045] Embodiment 1:

[0046] like Figure 1-4 As shown, the valve body 1 is connected to the steam pipe to allow steam to flow in from the steam inlet 22. Since the main valve spring 29 on the turntable 28 at the bottom of the lower chamber 25 pushes the main valve flap 26 upward, and the main valve flap 26 is initially in the state where the side without the throttle hole 27 faces the steam inlet 22, when the steam just flows in from the steam inlet 22, it does not pass through the main valve flap 26 into the steam outlet 23. The pressure of the steam on the top of the main valve flap 26 is balanced with the pressure of the main valve spring 29, so that the main valve flap 26 is in a stable state, which is convenient for rapid limiting when the throttle hole 27 is opened later, thereby achieving rapid pressure reduction.

[0047] Steam enters between the two sealing plates 34 from the steam guide hole 1 210 through the steam guide pipe 3 320 and the steam guide pipe 2 319. The high-pressure steam pushes the baffle 323 to rotate, and at the same time drives the main valve core 33 to rotate through the rotating sleeve 35, and drives the main valve flap 26, the rotating disk 28, and the main valve spring 29 to rotate together, so that the throttle hole 27 facing the steam inlet 22 changes from large to small, so that the steam flows from the throttle hole 27 into the steam outlet 23, achieving initial pressure reduction.

[0048] like Figure 5-9As shown, the decompressed steam enters the control chamber 1 334 from the steam guide hole 211 through the steam guide pipe 1 318. When the steam pressure of the steam guide pipe 1 318 is high, the pressure in the control chamber 1 334 rises, pushing the regulating spring 315 and the pilot valve diaphragm 314 upward, and driving the pilot valve core 316 and the pilot valve flap 317 to move upward, so that the opening of the steam guide pipe 2 319 and the control chamber 1 334 is reduced, and the pressure in the pilot valve body 31 increases, so that the high-pressure steam in the steam guide pipe 320 and the steam guide pipe 2 319 enters between the two sealing plates 34, and pushes the baffle 323 to move, thereby driving the main valve core 33 to rotate through the rotating sleeve 35. , so that the throttle hole 27 facing the steam inlet 22 changes from large to small, reducing the inflow of high-pressure steam, thereby reducing the pressure of the steam in the steam outlet 23, thereby achieving the effect of pressure regulation; when the steam pressure difference is larger, the steam continues to push the baffle 323 to move to the square hole 1 324, and is blocked by the limit block 1 325, so that the high-pressure steam flows from the square hole 1 324 into the control chamber 2 335, thereby pushing the piston 32 to move downward, and driving the main valve flap 26 to move downward, reducing the number of throttle holes 27 in the upper chamber 24, and further reducing the pressure of the steam in the steam outlet 23 until the pressure of the steam in the steam outlet 23 is stable.

[0049] It should be noted that a torsion spring is installed in the rotating sleeve 35, and the two ends of the torsion spring are respectively connected to the baffle 323 and the limit block 325, so that the baffle 323 provides a certain resistance to the steam pressure of the steam guide pipe 2 319 until the pressure in the control chamber 1 334 is balanced, thereby achieving more precise adjustment.

[0050] When the pressure of the steam in the steam pipe 1 318 is low, the regulating spring 315 pushes the pilot valve diaphragm 314 downward, and drives the pilot valve core 316 and the pilot valve flap 317 to move downward, so that the opening of the steam pipe 2 319 and the control chamber 1 334 increases, and the pressure in the pilot valve body 31 decreases, so that the high-pressure fluid in the steam pipe 320 and the steam pipe 2 319 is discharged through the steam pipe 1 318; thereby reducing the pressure in the pilot valve body 31, and causing the piston 32 to drive the main valve flap 26 to move upward, so that the number of throttling holes 27 in the upper chamber 24 is increased, thereby increasing the inflow of high-pressure steam and improving the steam pressure of the steam outlet 23; When the steam pressure difference is larger, the piston 32 contacts the sealing plate 34, so that the oblique square block 333 on the piston 32 pushes the second stopper 329 to slide along the arc groove 327, and drives the first stopper 328 to move through the connecting strip 330, so that the channel between the steam guide pipe four 321 and the two sealing plates 34 is opened, so that the steam enters between the two sealing plates 34 from the steam guide pipe four 321, and pushes the baffle 323 to rotate, so that the throttling hole 27 facing the steam inlet 22 changes from small to large, thereby increasing the inflow of high-temperature steam, and then increasing the pressure of the steam in the steam outlet 23 until the pressure of the steam in the steam outlet 23 is stable.

[0051] By arranging throttle holes 27 that gradually decrease in size on the main valve flap 26, the pressure regulation accuracy can be finer and more precise, and the main valve flap 26 can be rotated and moved up and down according to the pressure, thereby changing the number of throttle holes 27 facing the steam inlet 22 and adjusting the size of the throttle holes 27 facing the steam inlet 22, so that the steam after output is more stable and more precise.

[0052] like Figure 2 , Figure 4 As shown, the desuperheating water is input into the main valve disc 26 through the guide pipe 41 by the booster pump 43, and is sprayed on the high-pressure steam flowing in from the steam inlet 22 through the nozzle 42. Since the high-pressure steam flowing in from the steam inlet 22 has a relatively high pressure and temperature, the desuperheating water and the high-pressure steam are mixed more evenly and the atomization effect is improved; and when the main valve disc 26 descends, the main valve disc 26 drives the sliding sleeve 45 to move downward, reducing the nozzle area of ​​the nozzle 42; the nozzle hole size of the nozzle 42 is increased from small to large. The nozzle 42 is enlarged, and the nozzle 42 is connected to the turntable 28 by an elastic element. A block is provided on the guide tube 41, through which the nozzle 42 is blocked away from the steam inlet 22, so that the nozzle of the nozzle 42 faces the direction of the steam inlet 22. When the main valve disc 26 rotates, the turntable 28 drives the nozzle 42 to rotate, so that the nozzle hole of the nozzle 42 changes from large to small, thereby quickly reducing the amount of cooling water, realizing rapid limiting, preventing excessive cooling water from evaporating incompletely, making the temperature adjustment inaccurate, and affecting the cooling effect.

[0053] The temperature is detected by the thermometer 213 and the amount of cooling water is adjusted by the control valve 44. The steam pressure is detected by the pressure gauge 212 and the required steam pressure is adjusted by the adjusting knob 312. The adjusting knob 312 is turned to rotate the adjusting bolt 311, and the threaded sleeve 310 and the slide plate 313 threadedly connected with the adjusting bolt 311 are driven to slide upward or downward, thereby driving the guide valve diaphragm 314 to move up and down through the adjusting spring 315, and controlling the fluid flow rate by driving the guide valve flap 317, thereby controlling the required steam pressure.

[0054] The invention has a simple structure, is easy to install, combines the effects of reducing temperature and pressure, reduces occupied space, improves accuracy, and can achieve rapid limiting.

[0055] The embodiments of the present invention are provided for the purpose of illustration and description. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A temperature and pressure reducer with a quick limit structure and convenient installation, comprising: A valve body (1), characterized in that: the valve body (1) comprises a main valve module (2) and a pilot valve module (3), and a temperature reduction mechanism (4) is installed on the valve body (1); The main valve module (2) comprises a main valve body (21), a steam inlet (22) and a steam outlet (23) are arranged on both sides of the main valve body (21), an upper chamber (24) and a lower chamber (25) are arranged at the center of the main valve body (21), the upper chamber (24) and the lower chamber (25) are respectively connected to the steam inlet (22) and the steam outlet (23), the upper chamber (24) and the lower chamber (25) are connected and slidably connected with a main valve flap (26), the main valve flap (26) is a hollow cylinder, and throttle holes (27) from small to large are arranged around the main valve flap (26), and a part is left without a throttle hole (27), the main valve flap (26) is opened at one end close to the bottom of the lower chamber (25), the bottom of the lower chamber (25) is rotatably connected with a turntable (28), and a main valve spring (29) is installed between the main valve flap (26) and the turntable (28); The temperature reduction mechanism (4) comprises a flow guide tube (41), a nozzle (42) is installed at the output end of the flow guide tube (41), and the nozzle (42) is located inside the main valve flap (26).

2. The temperature and pressure reducing device with a quick limiting structure and convenient installation according to claim 1, characterized in that: A first steam guide hole (210) and a second steam guide hole (211) are respectively provided on the main valve body (21) at the steam inlet (22) and the steam outlet (23).

3. The temperature and pressure reducing device with a quick limiting structure and convenient installation as claimed in claim 2, characterized in that: The pilot valve module (3) comprises a pilot valve body (31), the pilot valve body (31) is a hollow square body with an opening at the upper end, a piston (32) is slidably connected inside the pilot valve body (31), a main valve core (33) is slidably connected to the center of the piston (32), the main valve core (33) is hollow, the main valve core (33) is fixedly connected to the main valve flap (26), two sealing plates (34) are fixedly connected to the top of the pilot valve body (31), the sealing plate (34) is a hollow circle, a rotating sleeve (35) is rotatably connected between the two sealing plates (34), the rotating sleeve (35) is slidably connected to the main valve core (33), and a hollow tube (36) is fixedly connected to the sealing plate (34) away from the piston (32).

4. The temperature and pressure reducing device with a quick limiting structure and convenient installation as claimed in claim 3, characterized in that: The edge of the pilot valve body (31) is fixedly connected to four pillars (37), a fixing plate (38) is fixedly connected to the pillar (37), a hollow pillar (39) is fixedly connected to the center of the fixing plate (38), a threaded sleeve (310) is slidably connected to the top of the hollow pillar (39), an adjusting bolt (311) is internally threadedly connected to the threaded sleeve (310), and an adjusting screw (311) fixedly connected to the hollow pillar (39) is rotatably connected to the adjusting screw (311). A button (312) is provided, one end of the threaded sleeve (310) is fixedly connected to a slide plate (313), the center of the hollow column (39) is slidably connected to a pilot valve diaphragm (314), an adjusting spring (315) is installed between the pilot valve diaphragm (314) and the slide plate (313), one end of the pilot valve diaphragm (314) close to the bottom of the hollow column (39) is fixedly connected to a pilot valve core (316), and one end of the pilot valve core (316) is fixedly connected to a pilot valve flap (317).

5. The temperature and pressure reducing device with a quick limiting structure and convenient installation as claimed in claim 4, characterized in that: A steam guide pipe 1 (318) is fixedly connected between the steam guide hole 2 (211) and the hollow column (39), and two ends of the steam guide pipe 1 (318) are respectively connected to the steam guide hole 2 (211) and the hollow column (39), and the connection point between the steam guide pipe 1 (318) and the hollow column (39) is located between the pilot valve diaphragm (314) and the slide plate (313), a steam guide pipe 2 (319) is fixedly connected between the pilot valve body (31) and the hollow column (39), and two ends of the steam guide pipe 2 (319) are respectively connected to the pilot valve body (31) and the hollow column (39), and the connection point between the steam guide pipe 2 (319) and the hollow column (39) is located on one side of the pilot valve flap (317), and the The connection point between the steam guide pipe 2 (319) and the pilot valve body (31) is located between the two sealing plates (34); the steam guide pipe 3 (320) is fixedly connected between the steam guide hole 1 (210) and the steam guide pipe 2 (319); and the two ends of the steam guide pipe 3 (320) are respectively connected to the steam guide hole 1 (210) and the steam guide pipe 2 (319); the steam guide pipe 4 (321) is fixedly connected between the pilot valve flap (317) and the steam guide pipe 1 (318); and the two ends of the steam guide pipe 4 (321) are respectively connected to the pilot valve flap (317) and the steam guide pipe 1 (318); and the connection point between the steam guide pipe 4 (321) and the pilot valve flap (317) is located between the two sealing plates (34).

6. The temperature and pressure reducing device with a quick limiting structure and convenient installation as claimed in claim 5, characterized in that: A fixed block (322) is fixedly connected between the two sealing plates (34) and located on one side of the second steam guide pipe (319); a baffle (323) is fixedly connected on the rotating sleeve (35) and located on the other side of the second steam guide pipe (319); a square hole (324) is provided on the sealing plate (34) close to the piston (32) and a limiting block (325) and a limiting block (326) are fixedly connected; the limiting block (325) is located on one side of the square hole (324) close to the fixed block (322); the limiting block (326) is located on one side of the baffle (323) close to the fixed block (322); an arc-shaped sliding groove (323) is provided on the sealing plate (34) close to the piston (32) and located between the fixed block (322) and the limiting block (325). 27), a block 1 (328) and a block 2 (329) are slidably connected on the arc-shaped slide groove (327), a connecting strip (330) is fixedly connected between the block 1 (328) and the block 2 (329), the block 2 (329) is located at the connection between the steam guide pipe 4 (321) and the guide valve flap (317), a spring (331) is fixedly connected between the block 1 (328) and the fixed block (322), a square hole 2 (332) is provided on the sealing plate (34) close to the piston (32) and located between the block 2 (329) and the limit block 2 (326), an oblique square block (333) is fixedly connected to the piston (32), the oblique square block (333) matches the square hole 2 (332), and the inclined surface matches the block 2 (329).

7. The temperature and pressure reducing device with a quick limiting structure and convenient installation as claimed in claim 4, characterized in that: The temperature reduction mechanism (4) comprises a booster pump (43) and a control valve (44); the booster pump (43) is installed on one side of the guide valve core (316); the booster pump (43) is connected to the guide pipe (41), and is connected to the main valve flap (26) through the hollow pipe (36) and the main valve core (33); the control valve (44) is installed on the guide pipe (41) and is located on one side of the booster pump (43); a sliding sleeve (45) is slidably connected to the nozzle (42); one end of the sliding sleeve (45) is fixedly connected to the main valve flap (26).

8. The temperature and pressure reducing device with a quick limiting structure and convenient installation according to claim 1, characterized in that: A pressure gauge (212) and a temperature gauge (213) are installed on the main valve body (21) and located at the steam outlet (23).

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