Axial flow valve with multi-stage cage sleeve structure

Abstract

The utility model provides an axial flow valve with a multi-stage cage sleeve structure, which comprises a valve inner body, a sleeve is arranged in the valve inner body, and a valve seat, a valve core and the multi-stage cage sleeve structure are arranged in the valve inner body. The multi-stage cage sleeve structure is installed on the end face of the sleeve, the valve seat is installed on the end face of the end, away from the sleeve, of the multi-stage cage sleeve structure, and the valve element is slidably arranged in the sleeve and the inner space of the multi-stage cage sleeve structure. The multistage cage sleeve structure is composed of a plurality of layers of cage sleeves which are detachably connected in sequence from inside to outside, a gap is reserved between every two adjacent layers of cage sleeves, throttling holes are densely distributed in each layer of cage sleeve, and the number of the throttling holes in each layer of cage sleeve is increased layer by layer from inside to outside. The cage sleeve of the multi-stage cage sleeve structure adopts a replaceable design, and the number of throttling holes of each layer of cage sleeve is gradually increased from inside to outside of the multi-stage cage sleeve, so that more circulation space is gradually provided for volume expansion caused by pressure drop of a medium, the flow speed of the medium cage sleeve is reduced, and the noise of the valve is further reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of fluid control, in particular to an axial flow valve with a multi-stage cage structure. Background Art

[0002] As a key fluid control device, axial flow valve is widely used in fluid pipeline systems in petrochemical, electric power, metallurgy and other industries. Its main function is to control the flow and pressure of the medium in the pipeline by adjusting the position of the valve core, so as to achieve stable operation of the fluid system and meet the process requirements. However, traditional axial flow valves still have some shortcomings in structure and operating performance, such as unstable sealing performance, low flow regulation accuracy, high noise and other problems, which affect the stability and reliability of the fluid system.

[0003] Therefore, it is of great practical significance and application value to improve the sealing performance, flow regulation accuracy and noise level of the axial flow valve. The utility model proposes an axial flow valve with optimized design to improve the performance and reliability of fluid control equipment in response to this problem. Utility Model Content

[0004] The utility model provides an axial flow valve with a multi-stage cage structure, the axial flow valve comprises a valve inner body, the valve inner body is provided with a sleeve, and a valve seat, a valve core and a multi-stage cage structure are installed in the valve inner body;

[0005] The multi-stage cage structure is installed on the end face of the sleeve, the valve seat is installed on the end face of the multi-stage cage structure away from the sleeve, the valve core is slidably arranged in the internal space of the sleeve and the multi-stage cage structure, and the valve core closes the valve when it slides in the internal space until it contacts the valve seat; wherein,

[0006] The multi-stage cage structure is composed of a plurality of multi-layer cages which are detachably connected from the inside to the outside, with a gap between two adjacent layers of the cages. Each layer of the cages is densely covered with throttling holes, and the number of throttling holes in each layer of the cages increases layer by layer from the inside to the outside.

[0007] Furthermore, the multi-layer cage is provided with a primary cage fixed to the innermost layer of the valve inner body, and a composite cage detachably sleeved on the primary cage, and the composite cage is composed of multiple layers of detachably sleeved and connected secondary cages from the inside to the outside.

[0008] Furthermore, both ends of each layer of the cage are sealed pipe sections with a hole-free design, and the throttling hole is opened between the sealed pipe sections.

[0009] A first sealing ring is arranged between the innermost cage and the sleeve, and a second sealing ring is arranged between the inner wall of the innermost cage and the valve core.

[0010] The axial flow valve regulates the flow and pressure downstream of the pipeline by covering the throttling holes of the innermost cage of the multi-stage cage with the valve core. When the valve is closed, the leakage points of the multi-stage cage of this patent are reduced to 2, which greatly improves the reliability of the product. At the same time, the cages of different levels are interchangeable except for the innermost level. The number of throttling holes of each layer of the multi-stage cage increases step by step from the inside to the outside, providing more circulation space for the volume expansion of the medium due to the pressure drop, reducing the flow rate of the medium cage and reducing the noise of the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0012] Figure 1 This is a cross-sectional view of an axial flow valve with a multi-stage cage structure of the utility model in one embodiment;

[0013] Figure 2 4 is a cross-sectional view of a multi-stage cage structure in an embodiment. DETAILED DESCRIPTION

[0014] In the following description, a large number of specific details are given to provide a more thorough understanding of the utility model. However, it is obvious to those skilled in the art that the utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the utility model, some technical features known in the art are not described.

[0015] In order to thoroughly understand the present invention, detailed steps and detailed structures will be presented in the following description to illustrate the technical solution of the present invention. The preferred embodiments of the present invention are described in detail below, but in addition to these detailed descriptions, the present invention may also have other implementations.

[0016] Reference Figure 1As shown, the utility model provides an axial flow valve with a multi-stage cage structure, the axial flow valve includes a valve inner body 1, the valve inner body 1 is provided with a sleeve 11, a valve seat 2, a valve core 3 and a multi-stage cage structure 4 are installed in the valve inner body 1; the multi-stage cage structure 4 is installed on the end face of the sleeve 11, the valve seat 2 is installed on an end face of the multi-stage cage structure 4 away from the sleeve 11, the valve core 3 is slidably arranged in the internal space of the sleeve 11 and the multi-stage cage structure 4, and the valve is closed when the valve core 3 slides in the internal space to contact the valve seat 2.

[0017] Further reading Figure 2 The multi-stage cage structure 4 is composed of a plurality of multi-layer cages that are detachably connected from the inside to the outside. Each layer of the cage is densely covered with throttle holes 44. The number of throttle holes 44 in each layer of the cage increases from the inside to the outside. There is a gap between two adjacent layers of the cage, which is conducive to the dispersion of the medium. Specifically, the multi-layer cage is provided with a primary cage 41 fixed to the innermost layer of the valve inner body 1, and a composite cage 42 detachably sleeved on the primary cage 41. Further, the composite cage 42 is composed of multiple layers of detachably sleeved and connected secondary cages 43 from the inside to the outside. The arrangement and number of throttle holes in the innermost cage must meet the flow characteristics and flow capacity requirements of the valve. With each additional cage, the inner diameter of the multi-stage cage will shrink inward. Except for the innermost primary cage 41, the remaining secondary cages 43 can be replaced.

[0018] Among them, the two ends of each layer of cage are sealed pipe sections with a hole-free design, and the throttle hole 44 is opened between the sealed pipe sections. A first sealing ring 12 is provided between the innermost cage and the sleeve 11, and a second sealing ring 13 is provided between the inner wall of the innermost cage and the valve core 3.

[0019] The multi-stage cage is used for axial flow valves. Figure 1 As shown, when the axial flow valve is working, the area of ​​the throttle hole of the innermost cage jacket is shielded by controlling the position of the valve core 3 to adjust the flow rate and pressure of the downstream. When the valve is closed, a seal is formed between the valve core and the valve seat, and the only leakage points related to the cage jacket are the first sealing ring 12 and the second sealing ring 13.

[0020] In summary, the utility model adopts the above technical solution, which can not only meet the complex fluid control requirements, but also show significant advantages in manufacturing cost and maintenance cost. The specific beneficial effects are as follows:

[0021] First, the design of multi-stage cages allows cages other than the innermost layer to be interchangeable. This feature not only simplifies the manufacturing process and reduces manufacturing costs, but also makes maintenance more convenient and economical. In practical applications, due to the interchangeability between cages, companies can flexibly adjust the combination of cages of different levels as needed to meet different working conditions and performance requirements. This flexibility not only improves production efficiency, but also reduces inventory costs.

[0022] Secondly, the throttle hole design on the multi-stage cage cleverly achieves the effect of gradually reducing pressure. The number of throttle holes increases from the inside to the outside, and when the medium passes through the cage from the inside to the outside, its pressure will decrease step by step. This design effectively reduces the noise caused by large pressure difference and improves the quality of the working environment. At the same time, the step-by-step pressure reduction also helps to extend the service life of the equipment and reduce the wear and damage caused by high pressure difference.

[0023] In addition, as the number of cage levels increases, the number of leakage points does not increase. On the contrary, through optimized design and manufacturing processes, the leakage points of the cage are reduced to only two. This design significantly improves the reliability of the equipment and reduces the safety risks and maintenance costs caused by leakage.

[0024] The above describes the preferred embodiments of the utility model. It should be understood that the utility model is not limited to the above-mentioned specific implementation methods, and the devices and structures that are not described in detail should be understood to be implemented in a common manner in the art; any technician familiar with the art can use the above-disclosed methods and technical contents to make many possible changes and modifications to the technical solutions of the utility model without departing from the scope of the technical solution of the utility model, or modify them into equivalent embodiments of equivalent changes, which does not affect the essential content of the utility model. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the utility model without departing from the content of the technical solution of the utility model still falls within the scope of protection of the technical solution of the utility model.

Claims

1. An axial flow valve with a multi-stage cage structure, the axial flow valve comprising a valve inner body (1), the valve inner body (1) being provided with a sleeve (11), characterized in that: A valve seat (2), a valve core (3) and a multi-stage cage structure (4) are installed in the valve inner body (1); The multi-stage cage structure (4) is mounted on the end surface of the sleeve (11), the valve seat (2) is mounted on an end surface of the multi-stage cage structure (4) away from the sleeve (11), the valve core (3) is slidably arranged in the internal space of the sleeve (11) and the multi-stage cage structure (4), and the valve core (3) closes the valve when it slides in the internal space until it contacts the valve seat (2); wherein, The multi-stage cage structure (4) is composed of a plurality of multi-layer cages which are detachably connected from the inside to the outside, a gap is left between two adjacent layers of the cages, each layer of the cages is densely covered with throttling holes (44), and the number of throttling holes (44) in each layer of the cages increases layer by layer from the inside to the outside.

2. An axial flow valve with a multi-stage cage structure as claimed in claim 1, characterized in that: The multi-layer cage is provided with a primary cage (41) fixed to the innermost layer of the valve inner body (1), and a composite cage (42) detachably sleeved on the primary cage (41), wherein the composite cage (42) is composed of multiple layers of detachably sleeved and connected secondary cages (43) from the inside to the outside.

3. An axial flow valve with a multi-stage cage structure as claimed in claim 1 or 2, characterized in that: Both ends of each layer of the cage are sealed pipe sections with no holes, and the throttling holes (44) are opened between the sealed pipe sections. A first sealing ring (12) is provided between the innermost cage and the sleeve (11), and a second sealing ring (13) is provided between the inner wall of the innermost cage and the valve core (3).

Images