A control valve trim structure

Abstract

The utility model discloses a regulating valve inner part structure, including valve seat, guide support, snap ring, valve cage, valve core, valve rod and guide rod, one end of valve seat is fixed with guide support, and the surface of guide support is equipped with first guide hole and four through -flow holes, and four through -flow holes are distributed in the periphery of first guide hole, and the other end of valve seat is fixed with snap ring, the middle part of valve cage is equipped with second guide hole, and the periphery surface of valve cage is evenly equipped with through -groove, and the bottom of valve cage is equipped with the slot, and the snap ring is connected in the slot, the valve core sliding is arranged in second guide hole, and the top of valve core is fixed with valve rod, and the bottom of valve core is fixed with guide rod, and guide rod is inserted in first guide hole, the advantage: through increase guide rod and first guide hole, has improved the corresponding speed and control ability of valve, has prolonged the time of the different shaft of valve core and valve rod and valve seat, has reduced the replacement frequency to valve core, has guaranteed the long -term stable operation of valve, has avoided the danger of urea ammonia system pipe network overpressure.

Description

Technical Field

[0001] This utility model relates to the field of regulating valve technology, specifically to a regulating valve internal structure. Background Technology

[0002] Control valves play a vital role in urea-ammonia systems and are an important component of industrial automation systems.

[0003] The current problem is that due to the pressure difference in the regulation system, a high pressure difference will cause the pipeline to vibrate. The pipeline vibration will cause the regulating valve to vibrate, resulting in frequent contact and wear between the valve core and the valve cage bushing. This leads to misalignment of the valve core and valve stem with the valve seat, slow valve response speed, reduced valve control capability, and more frequent valve core replacements. This poses a potential risk of pipeline overpressure to the safety of the entire urea ammonia system. Utility Model Content

[0004] The purpose of this invention is to provide a regulating valve internal structure to solve the problems mentioned in the background art.

[0005] This utility model is implemented by the following technical solution:

[0006] A regulating valve internal structure includes a valve seat, a guide bracket, a retaining ring, a valve cage, a valve core, a valve stem, and a guide rod. One end of the valve seat is fixed to the guide bracket, which has a first guide hole and four flow holes on its surface. The four flow holes are distributed around the first guide hole. The other end of the valve seat is fixed to a retaining ring. The valve cage has a second guide hole in its middle section, and its circumferential surface has uniformly formed through grooves. The bottom end of the valve cage has a retaining groove, and the retaining ring engages with the retaining groove. The valve core slides through the second guide hole, with a valve stem fixed to its top end and a guide rod fixed to its bottom end. The guide rod is movably inserted into the first guide hole.

[0007] Preferably, the bottom of the valve core has an annular groove and a chamfered surface, and the edge of the retaining ring and the chamfered surface are in movable contact.

[0008] The advantages of this utility model are: by adding a guide rod and a first guide hole, the response speed and control capability of the valve are improved, the time of misalignment between the valve core and valve stem and the valve seat is extended, and the frequency of valve core replacement is reduced; the valve is guaranteed to operate stably for a long period of time, the danger of overpressure in the urea ammonia system pipeline network is avoided, and the safe and stable operation of the device is guaranteed. Attached Figure Description

[0009] Figure 1 Schematic diagram of existing control valve structure

[0010] Figure 2 This is a schematic diagram of the structure of this utility model;

[0011] Figure 3 for Figure 2 The main view;

[0012] Figure 4 for Figure 3 Sectional view at point AA;

[0013] Figure 5 A partial structural diagram Figure 1 ;

[0014] Figure 6 A partial structural diagram Figure 2 ;

[0015] Figure 7 This is a schematic diagram of the valve cage structure;

[0016] Figure 8 A partial structural diagram Figure 3 .

[0017] In the figure: 1. Valve seat, 2. Guide bracket, 2.1. First guide hole, 2.2. Flow hole, 3. Snap ring, 4. Valve cage, 4.1. Second guide hole, 4.2. Through groove, 4.3. Snap groove, 5. Valve core, 5.1. Annular groove, 5.2. Chamfered surface, 6. Valve stem, 7. Guide rod, 8. Valve cage bushing. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1-8 This utility model provides a technical solution for the internal structure of a regulating valve:

[0020] A regulating valve internal structure includes a valve seat 1, a guide bracket 2, a retaining ring 3, a valve cage 4, a valve core 5, a valve stem 6, and a guide rod 7;

[0021] One end of the valve seat 1 is fixed with a guide bracket 2. The guide bracket 2 has a first guide hole 2.1 and four flow holes 2.2 on its surface. The four flow holes 2.2 are distributed around the first guide hole 2.1. The other end of the valve seat 1 is fixed with a retaining ring 3. The valve cage 4 has a second guide hole 4.1 in its middle. The valve cage 4 has through grooves 4.2 evenly distributed on its circumferential surface. The bottom end of the valve cage 4 has a retaining groove 4.3. The retaining ring 3 is engaged in the retaining groove 4.3. The valve core 5 slides through the second guide hole 4.1. The top end of the valve core 5 is fixed with a valve stem 6. The bottom end of the valve core 5 is fixed with a guide rod 7. The guide rod 7 is movably inserted into the first guide hole 2.1.

[0022] An annular groove 5.1 is formed at the bottom of the valve core 5, and a chamfered surface 5.2 is formed. The edge of the retaining ring 3 and the chamfered surface 5.2 are in contact.

[0023] The working principle is as follows: When the valve is opened, the valve stem 6 slides upward, and the valve stem 6 drives the valve core 5 and the guide rod 7 to slide upward at the same time, so that the edge of the retaining ring 3 and the chamfered surface 5.2 no longer abut and gradually move away. The guide rod 7 is always inserted into the first guide hole 2.1, so that the liquid in the pipeline flows into the valve cage 4 from the four flow holes 2.2, and then flows out of the valve cage 4 through the through groove 4.2 and enters another pipeline.

[0024] By adding guide rod 7 and first guide hole 2.1, the valve's response speed and control capability are improved, the time when valve core 5 and valve stem 6 are out of sync with valve seat 1 is extended, and the frequency of valve core 5 replacement is reduced; this ensures long-term stable operation of the valve, avoids the danger of overpressure in the urea ammonia system pipeline, and ensures the safe and stable operation of the device.

[0025] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A regulating valve internal structure, characterized in that: The valve includes a valve seat (1), a guide bracket (2), a retaining ring (3), a valve cage (4), a valve core (5), a valve stem (6), and a guide rod (7); one end of the valve seat (1) is fixed with the guide bracket (2), the guide bracket (2) has a first guide hole (2.1) and four flow holes (2.2) on its surface, the four flow holes (2.2) are distributed around the first guide hole (2.1), and the other end of the valve seat (1) is fixed with a retaining ring (3); the valve cage (4) has a central opening The valve cage (4) is provided with a second guide hole (4.1), and the circumferential surface of the valve cage (4) is uniformly provided with through grooves (4.2). The bottom end of the valve cage (4) is provided with a retaining groove (4.3), and the retaining ring (3) is engaged in the retaining groove (4.3). The valve core (5) is slidably inserted in the second guide hole (4.1). The top end of the valve core (5) is fixed with a valve stem (6), and the bottom end of the valve core (5) is fixed with a guide rod (7). The guide rod (7) is movably inserted into the first guide hole (2.1).

2. The internal structure of a regulating valve according to claim 1, characterized in that: The bottom of the valve core (5) has an annular groove (5.1) and a chamfered surface (5.2), and the edge of the retaining ring (3) and the chamfered surface (5.2) are in contact.

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