Anti-leakage steam pressure reducing valve

Abstract

The utility model provides an anti-leakage steam pressure reducing valve which comprises a main valve seat, a guide valve seat, a valve body and a valve bonnet, flanges are installed on the two sides of the valve body, the valve body is composed of an air inlet cavity and an air outlet cavity, and a valve rod is jointly arranged on the inner side of the air inlet cavity and the inner side of the air outlet cavity. Gas can be guided when the guide vanes rotate, the gas is disordered and rotates, so that fluid flows through a flow channel and is collided and turned for multiple times, energy is consumed, and the purpose of step-by-step pressure reduction is achieved; when steam enters the large cavity after passing through the narrow channel, due to the fact that the area is suddenly enlarged, airflow forms a strong vortex, in the vortex, the airflow speed is almost equal to zero, and therefore the gas pressure is further reduced, it is guaranteed that the gas pressure at the outlet and the gas pressure at the inlet are in a stable state all the time, and the sealing performance and safety of the device are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to steam pressure reducing valve technical field, more specifically, especially relate to a kind of anti-leakage steam pressure reducing valve. BACKGROUND

[0002] Steam pressure reducing valve is a kind of device for controlling the steam pressure in system, it can adjust and maintain the steam pressure inside pipe, ensure the safety and efficient operation of system.

[0003] Traditional pressure reducing valve has limited pressure reducing capacity when dealing with high pressure difference, it is difficult to accurately reduce high-pressure steam to the required low pressure range, the structural design of traditional pressure reducing valve lacks balance mechanism and independent adjustment structure, if the gas pressure entering from inlet cavity is too large without balance, and valve rod is directly installed in cavity for adjustment, it will lead to imbalance of inlet cavity or local pressure, and further affect the adjustment stability and overall sealing performance, and traditional pressure reducing valve is difficult to realize accurate pressure reduction under high pressure and maintain stable outlet pressure and flow, which has safety hazard.

[0004] Therefore, in view of the above, the existing structure and defects are improved, and an anti-leakage steam pressure reducing valve is provided to achieve more practical value. INVENTION CONTENTS

[0005] To solve the above technical problems, the utility model provides an anti-leakage steam pressure reducing valve, which is achieved by the following specific technical means:

[0006] An anti-leakage steam pressure reducing valve, comprising a main valve seat and a guide valve seat, a valve body and a valve cap, flanges are installed on both sides of the valve body, the valve body is composed of an inlet cavity and an outlet cavity, a valve rod is arranged on the inner side of the inlet cavity and the outlet cavity, a main valve core is arranged at the bottom of the valve rod, the main valve core is connected with the main valve seat, a flow-guiding pressure reducing assembly is arranged on the inner wall of the inlet cavity, and a plurality of pressure reducing plates are installed on the inner wall of the outlet cavity.

[0007] Preferably, the flow-guiding pressure reducing assembly comprises two mounting rings, the two mounting rings are fixed on the inner wall of the inlet cavity, the opposite sides of the two mounting rings are provided with connecting plates, and the outer sides of the two connecting plates are provided with a plurality of connecting arms, and each connecting arm is fixed to one side of the corresponding mounting ring.

[0008] Preferably, the flow-guiding assembly further comprises an outer shell, the two sides of the outer shell are rotatably connected with the inner walls of the corresponding connecting plates, a plurality of flow-guiding vanes are installed on the outer side wall of the outer shell, and a transmission mechanism is arranged on the inner wall of the outer shell.

[0009] Preferably, the transmission mechanism comprises two inner gear rings, the two inner gear rings are installed on two sides of the inner wall of the outer shell, a double-shaft motor is installed on one side of the inner wall of the outer shell, two human output ends of the double-shaft motor are both provided with connecting shafts, the two ends of the two connecting shafts are both provided with gears, and the two gears are respectively meshed with the inner gear rings on the corresponding side.

[0010] Preferably, the surfaces of the plurality of pressure reduction plates are provided with a plurality of honeycomb hole structures, and the plurality of pressure reduction plates are connected in series through the connecting columns.

[0011] Preferably, the inner wall of the main valve core is provided with a sealing gasket, and the top of the sealing gasket abuts against the bottom of the valve rod.

[0012] Preferably, the inner walls of the two flanges are both provided with sealing rings, the sealing gasket and the two sealing rings are both made of ceramic material, and the inner walls of the ceramic material are both embedded with graphite layers.

[0013] Compared with the prior art, the utility model has the advantages of the following:

[0014] 1. The utility model discloses a flow guiding vane, an inner gear ring, a gear, a double-shaft motor, a connecting shaft and a pressure reduction plate jointly act when gas enters the air inlet cavity, drive the double-shaft motor to run, and then drive the plurality of flow guiding vanes of the outer shell through the relevant structure, the flow guiding vane can guide the gas when rotating, the gas is disturbed and rotates, makes the fluid flow through the flow channel and collides and turns over for many times, consumes energy, reaches the purpose of step -by -step pressure reduction, simultaneously, the use of the plurality of pressure reduction plates in the air outlet cavity, when the steam passes through the narrow channel and then enters the larger cavity, because the area expands suddenly, the airflow forms the strong vortex, in the vortex, the airflow speed is almost equal to zero, thereby the gas pressure is further reduced, guarantees the air pressure of export and import to be in the more stable state all the time, improves the sealing performance and safety of the device.

[0015] 2. The utility model discloses the effect of sealing gasket and two sealing rings, improves the sealing performance of the device, simultaneously, the sealing gasket is adaptively arranged with the main valve core, when the valve rod extrudes or contacts the main valve core, the sealing gasket plays the sealing effect simultaneously, can play the effect of protecting the main valve core, avoids the action of the valve rod and makes the main valve core be damaged, improves the service life of the device, and the sealing gasket and the sealing ring all adopt ceramic material, and the inside is embedded with the graphite layer, the graphite layer expands when meeting high temperature, and then enhances the sealing performance, further prevents the seepage of gas, and enhances the sealing property of the device. DRAWINGS

[0016] Figure 1 It is a kind of anti -seepage steam pressure reduction valve main body structure schematic diagram of the utility model.

[0017] Figure 2 is a section structure schematic diagram of the anti-leakage steam pressure reducing valve.

[0018] Figure 3 is an anti-leakage steam pressure reducing valve Figure 2 enlarged structure schematic diagram of A in the middle.

[0019] Figure 4 is a partial structure schematic diagram of the anti-leakage steam pressure reducing valve.

[0020] Figure 5 is an inner gear ring and gear structure schematic diagram of the anti-leakage steam pressure reducing valve.

[0021] Figure 6 is a double-shaft motor and connecting shaft structure schematic diagram of the anti-leakage steam pressure reducing valve.

[0022] In the figure, the correspondence between the component name and the figure number is as follows:

[0023] 1, main valve seat; 2, valve body; 3, flange; 4, pilot valve seat; 5, valve cap; 6, air inlet cavity; 7, air outlet cavity; 8, valve stem; 9, main valve core; 10, mounting ring; 11, connecting arm; 12, connecting plate; 13, outer shell; 14, guide vane; 15, inner gear ring; 16, gear; 17, double-shaft motor; 18, connecting shaft; 19, pressure reducing plate; 20, gasket; 21, sealing ring. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments.

[0025] Embodiment:

[0026] As shown in the accompanying Figure 1 to the accompanying Figure 6 :

[0027] The present application provides an anti-leakage steam pressure reducing valve, which comprises a main valve seat 1, a pilot valve seat 4 and a valve body 2, a valve cap 5, flanges 3 are installed on both sides of the valve body 2, the valve body 2 is composed of an air inlet cavity 6 and an air outlet cavity 7, a valve stem 8 is arranged on the inner side of the air inlet cavity 6 and the air outlet cavity 7, a main valve core 9 is arranged at the bottom of the valve stem 8, the main valve core 9 is connected with the main valve seat 1, a guide pressure reducing assembly is arranged on the inner wall of the air inlet cavity 6, and a plurality of pressure reducing plates 19 are installed on the inner wall of the air outlet cavity 7.

[0028] The flow guide pressure reducing assembly comprises two mounting rings 10, both of which are fixed to the inner wall of the air inlet cavity 6, and the opposite side of each mounting ring 10 is provided with a connecting plate 12, and the outer side of each connecting plate 12 is provided with a plurality of connecting arms 11, each of which is fixed to one side of the corresponding mounting ring 10.

[0029] The flow guide assembly further comprises an outer shell 13, the inner wall of each connecting plate 12 is rotatably connected to the outer shell 13, the outer side wall of the outer shell 13 is provided with a plurality of flow guide vanes 14, and the inner wall of the outer shell 13 is provided with a transmission mechanism.

[0030] The transmission mechanism comprises two inner gear rings 15, both of which are installed on the inner wall of the outer shell 13, and a double-shaft motor 17 is installed on one side of the inner wall of the outer shell 13, both output ends of the double-shaft motor 17 are provided with connecting shafts 18, both ends of each connecting shaft 18 are provided with a gear 16, and the two gears 16 are meshed with the corresponding inner gear ring 15.

[0031] The surface of each pressure reducing plate 19 is provided with a plurality of honeycomb hole structures, and the plurality of pressure reducing plates 19 are connected in series through connecting columns. Through the cooperation of the flow guide vanes 14, the inner gear rings 15, the gears 16, the double-shaft motor 17, the connecting shafts 18, and the pressure reducing plates 19, when the gas enters the air inlet cavity 6, the double-shaft motor 17 is driven to rotate, and the plurality of flow guide vanes 14 of the outer shell 13 are driven to rotate through the related structure, the flow guide vanes 14 can guide the gas when rotating, the gas is disturbed and rotated, the fluid flows through the flow passage and collides and turns multiple times, consumes energy, and achieves the purpose of step-by-step pressure reduction. At the same time, in cooperation with the use of the plurality of pressure reducing plates 19 in the air outlet cavity 7, when the gas passes through the plurality of honeycomb structures, the steam enters the larger cavity after passing through the narrow channel, and due to the sudden expansion of the area, the gas flow forms a strong vortex, and the gas flow speed in the vortex is almost zero, thereby further reducing the gas pressure, ensuring that the gas pressure at the outlet and the inlet is always in a relatively stable state, and improving the sealing performance and safety of the device.

[0032] The inner wall of the main valve core 9 is provided with a sealing gasket 20, and the top of the sealing gasket 20 abuts against the bottom of the valve rod 8.

[0033] The inner wall of the two flanges 3 is provided with a sealing ring 21, the material of the sealing gasket 20 and the two sealing rings 21 is ceramic, and the inner wall of the ceramic is embedded with a graphite layer, the sealing performance of the device is improved through the sealing gasket 20 and the two sealing rings 21, meanwhile, the sealing gasket 20 is matched with the main valve core 9, when the valve rod 8 is pressed or contacted with the main valve core 9, the sealing gasket 20 plays a sealing role and can protect the main valve core 9, avoiding the damage of the main valve core 9 caused by the action of the valve rod 8, prolonging the service life of the device, and the sealing gasket 20 and the sealing ring 21 are made of ceramic and embedded with a graphite layer, the graphite layer expands when encountering high temperature, thereby enhancing the sealing performance, further preventing gas leakage and enhancing the sealing performance of the device.

[0034] The working principle of the embodiment is as follows: the flange 3 is connected with the pipeline, when the gas enters the inlet cavity 6, the double-shaft motor 17 is driven to rotate, the two connecting shafts 18 are driven to rotate, the corresponding gear 16 is driven to rotate, the corresponding inner ring gear 15 is synchronously driven through the rotation of the gear 16, and finally the outer shell 13 is driven to rotate, when the outer shell 13 rotates, the plurality of guide vanes 14 are synchronously rotated, at this time, the passing gas is repeatedly collided and turned by the guide vanes 14, energy is consumed, and preliminary pressure reduction is realized.

[0035] Finally, the steam enters the outlet cavity 7 from the inlet cavity 6 and passes through a plurality of pressure reduction plates 19, the honeycomb hole structure on the surface of each pressure reduction plate 19 enables the steam to enter a larger cavity after passing through a narrow channel, and a strong vortex is formed, due to the vortex effect, the gas flow velocity is almost equal to zero in the vortex, kinetic energy is converted into heat energy, the steam pressure is further reduced, the multi-stage pressure reduction structure ensures that the steam pressure is gradually reduced, and finally the stable outlet pressure is achieved, the sealing gasket 20 and the sealing ring 21 are made of ceramic and embedded with a graphite layer, the sealing performance is enhanced, the sealing gasket 20 expands at high temperature, further preventing steam leakage, and the sealing performance and safety of the device are improved.

[0036] The embodiments of the utility model are given for the purpose of example and description, and are not exhaustive or limit the utility model to the disclosed forms. Many modifications and changes are obvious to those skilled in the art. The embodiments are selected and described in order to better illustrate the principles and practical application of the utility model, and enable those skilled in the art to understand the utility model so as to design various embodiments with various modifications suitable for specific purposes.

Claims

1. A leakage-proof steam reducing valve comprising a main valve seat (1) and a pilot valve seat (4) and a valve body (2), a bonnet (5), characterized in that: Both sides of the valve body (2) are provided with flanges (3), the valve body (2) is composed of an air inlet cavity (6) and an air outlet cavity (7), the inner sides of the air inlet cavity (6) and the air outlet cavity (7) are provided with a valve rod (8) in common, the bottom of the valve rod (8) is provided with a main valve core (9), the main valve core (9) is connected with a main valve seat (1), the inner wall of the air inlet cavity (6) is provided with a flow guide pressure reducing assembly, and the inner wall of the air outlet cavity (7) is provided with a plurality of pressure reducing plates (19).

2. The containment steam reducing valve of claim 1 wherein: The flow guide pressure reducing assembly comprises two mounting rings (10), both the mounting rings (10) are fixed to the inner wall of the air inlet cavity (6), the opposite sides of the mounting rings (10) are provided with connecting plates (12), and the outer sides of the connecting plates (12) are provided with a plurality of connecting arms (11), and each connecting arm (11) is fixed to one side of the corresponding mounting ring (10).

3. The containment steam reducing valve of claim 2 wherein: The flow guide assembly further comprises an outer shell (13), the outer shell (13) is rotatably connected to the inner walls of the corresponding connecting plates (12) on both sides, a plurality of flow guide vanes (14) are mounted on the outer wall of the outer shell (13), and a transmission mechanism is arranged on the inner wall of the outer shell (13).

4. The containment steam reducing valve of claim 3 wherein: The transmission mechanism comprises two inner gear rings (15), the inner gear rings (15) are mounted on the inner walls of the outer shell (13) on both sides, a double-shaft motor (17) is mounted on one side of the inner wall of the outer shell (13), connecting shafts (18) are mounted on the two human output ends of the double-shaft motor (17), gear wheels (16) are mounted on the two ends of the connecting shafts (18), and the gear wheels (16) are meshed with the corresponding inner gear rings (15).

5. The containment steam reducing valve of claim 1 wherein: The surfaces of the plurality of pressure reducing plates (19) are provided with a plurality of honeycomb hole structures, and the plurality of pressure reducing plates (19) are connected in series through connecting columns.

6. The containment steam reducing valve of claim 1 wherein: The inner wall of the main valve core (9) is provided with a sealing gasket (20), and the top of the sealing gasket (20) abuts against the bottom of the valve rod (8).

7. The containment steam reducing valve of claim 6 wherein: The inner walls of the two flanges (3) are provided with sealing rings (21), the sealing gasket (20) and the two sealing rings (21) are made of ceramic material, and the inner walls of the ceramic material are embedded with graphite layers.

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