Special-shaped single-seat regulating valve

Abstract

The utility model discloses a special-shaped single-seat regulating valve, relates to the technical field of regulating valves, and solves the problems that a traditional single-seat regulating valve is not smooth in medium flow, difficult to ensure the flow regulation precision and the like in a special scene that an inlet and an outlet of a flow channel are distributed at an oblique angle. A flow channel inlet and a flow channel outlet are formed in the valve body, the center direction of the flow channel outlet and the center direction of the flow channel inlet are located on different axes, and the center direction of the flow channel outlet inclines towards the lower side direction. The bottom face of the opening and closing part forms an inclined guide face, the inclined guide face inclines from the bottom to the inclined upper portion, and an acute included angle is formed between the inclined guide face and the central axis of the connecting rod part. By means of the structure, an inlet medium can be guided to flow to an outlet more smoothly, sudden change of the flow direction of the medium in a flow channel is reduced, unnecessary vortex and turbulent flow are avoided, the medium flows more smoothly, energy loss is reduced, impact and scouring of the medium to internal parts of the valve are reduced due to smooth medium flowing, and the abrasion degree of the valve parts is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of regulating valves, in particular to a special-shaped single-seat regulating valve. Background Art

[0002] Traditional single-seat control valves are generally designed as straight-through structures, with the inlet and outlet of the flow channel distributed in a straight line. This design can meet basic control requirements in most cases. In many special industrial application scenarios, the layout of the fluid delivery pipeline system is limited by the overall equipment structure or process flow layout, and the inlet pipeline and the pipeline outlet are distributed at an oblique angle. When using traditional single-seat control valves in this oblique distribution of flow channels, the inlet medium will encounter a large flow direction mutation in the process of flowing to the outlet, which will cause a series of problems.

[0003] First, when the fluid flows in such a flow channel with an oblique distribution of inlets and outlets, if a traditional valve core structure is used, the fluid will encounter greater resistance due to the sharp change in flow direction after flowing through the valve core area, the smoothness of the medium will be destroyed, and unnecessary eddies and turbulence will be easily generated. This not only increases energy loss, but may also cause increased wear of valve components and shorten the service life of the equipment. This is unacceptable in many industrial environments with high requirements for sealing. For example, when used in pipelines that transport toxic, harmful, flammable or explosive media in the chemical industry, the consequences will be more serious.

[0004] Secondly, the unstable flow state caused by the sudden change of the medium flow direction will affect the flow regulation accuracy of the control valve. The unstable medium flow makes it difficult for the valve core to accurately control the flow, and it is difficult to meet the strict requirements of the production process for precise flow control, thus affecting the stability of the entire production process and the consistency of product quality. Utility Model Content

[0005] Purpose of the utility model: In order to overcome the defects of the prior art, the utility model provides a special-shaped single-seat regulating valve to solve the problems of the traditional single-seat regulating valve in the special scenario where the inlet and outlet of the flow channel are distributed at an oblique angle, such as the medium flow is not smooth and the flow regulation accuracy is difficult to ensure.

[0006] The technical solution of the utility model comprises a valve body, a valve cover installed above the valve body, a sleeve fixedly installed in the valve body, a valve stem movably passing through the valve cover and the sleeve, and a valve core connected to the bottom end of the valve stem, the valve core comprises an opening and closing portion and a connecting rod portion on the lower side, a flow channel inlet and a flow channel outlet are provided in the valve body, the center direction of the flow channel outlet and the center direction of the flow channel inlet are located on different axes, and the center direction of the flow channel outlet is inclined toward the lower side; an inclined guide surface is formed on the bottom surface of the opening and closing portion, the inclination direction of the inclined guide surface is inclined from the bottom to the oblique upper direction, and the inclined guide surface forms an acute angle with the center axis of the connecting rod portion.

[0007] By adopting the above technical scheme, by designing the flow channel outlet to be coaxial with the inlet and inclined downward, and cooperating with the shape of the inclined guide surface on the bottom surface of the opening and closing part, the inlet medium can be guided to flow to the outlet more smoothly, reducing the sudden change of the flow direction of the medium in the flow channel, avoiding the generation of unnecessary eddies and turbulence, making the medium flow smoother, reducing energy loss, and smooth medium flow reduces the impact and scouring of the medium on the internal components of the valve, and reduces the wear of the valve components. It is especially suitable for industrial environments with high requirements on sealing, such as pipeline systems for conveying toxic, harmful, flammable or explosive media in the chemical industry, thereby improving the safety and reliability of the equipment; the stable medium flow state is conducive to the valve core to accurately control the flow, so that the regulating valve can better meet the strict requirements of the production process for precise flow control, thereby ensuring the stability of the entire production process and the consistency of product quality.

[0008] In a possible design, the bottom end of the valve stem is inserted into the connecting rod portion and two fixing pins are provided through the connecting position of the two. The fixing pins are provided perpendicular to the central axis of the connecting rod portion and the two fixing pins are distributed perpendicular to each other.

[0009] With the above design, the bottom end of the valve stem is connected to the connecting rod by two fixing pins which are perpendicular to each other and distributed vertically and perpendicular to the central axis of the connecting rod. This connection method can effectively transmit the movement and force of the valve stem to the connecting rod and the valve core, thereby ensuring the movement accuracy and stability of the valve core in the valve body and the normal operation of the regulating valve. The fixing pins which are perpendicular to each other can increase the structural strength of the connection between the valve stem and the connecting rod, thereby enabling it to withstand greater working pressure and impact force, thereby improving the overall durability of the regulating valve.

[0010] In a possible design, the sleeve has a sliding hole for the valve stem and the connecting rod to movably pass through, and four axial guide grooves are also opened on the wall of the sliding hole, and both ends of the fixing pin extend into the corresponding axial guide grooves.

[0011] With the above design, the cooperation between the axial guide groove in the sleeve and the fixing pin provides precise guiding effect for the movement of the valve stem and the connecting rod, prevents the valve core from rotating due to the force of the medium, avoids the deviation of the inclined guide surface, and effectively prevents the valve stem and the connecting rod from circumferential rotation or deviation during operation, further ensures the movement stability of the valve core, and ensures that the medium can flow smoothly to the flow channel outlet.

[0012] In a possible design, an extension tube is installed between the valve cover and the valve body, and the extension tube is threadedly fixed to the valve cover and the valve body respectively. A guide disc sleeve is provided at the contact position between the extension tube and the valve cover. The guide disc sleeve is outermostly disposed on the valve stem and slidingly cooperates with the valve stem. The outer edge of the guide disc sleeve is padded between the extension tube and the valve cover, and sealing gaskets are installed at the upper and lower contact positions of the guide disc sleeve.

[0013] With the above design, the guide disc sleeve can provide additional guiding effect for the movement of the valve stem, further ensuring the linearity and stability of the valve stem movement; at the same time, the guide disc sleeve can also play a certain supporting role for the valve stem, reducing the bending deformation of the valve stem during operation, and is suitable for application scenarios where the valve stem is lengthened. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A cross-sectional view of the utility model as a whole;

[0015] Figure 2 It is a cross-sectional view of a part of the structure of the utility model;

[0016] Figure 3 This is a schematic diagram of the medium flow when the valve of the utility model is in the open state;

[0017] Among them, 1. valve body; 11. flow channel inlet; 12. flow channel outlet; 2. valve cover; 3. sleeve; 31. sliding hole; 32. axial guide groove; 4. valve stem; 41. fixing pin; 5. valve core; 51. opening and closing part; 52. connecting rod part; 53. inclined guide surface; 6. extension tube; 61. guide disc sleeve; 62. sealing gasket. DETAILED DESCRIPTION

[0018] like Figures 1 to 3The illustrated special-shaped single-seat regulating valve comprises a valve body 1, a valve cover 2 installed on the top of the valve body 1, a sleeve 3 fixedly installed in the valve body 1, a valve stem 4 movably penetrating the valve cover 2 and the sleeve 3, and a valve core 5 connected to the bottom end of the valve stem 4, wherein the valve core 5 comprises an opening and closing portion 51 at the bottom and a connecting rod portion 52 at the top. The valve body 1 has a flow channel inlet 11 and a flow channel outlet 12, the center direction of the flow channel outlet 12 and the center direction of the flow channel inlet 11 are located on different axes, and the center direction of the flow channel outlet 12 is inclined downward; since the flow channel in the valve body 1 is streamlined, the flow channel inlet 11 and the flow channel outlet 12 refer to the flange position, and therefore, the center direction of the two also refers to the center axis direction of the flange position. The bottom surface of the opening and closing portion 51 forms an inclined guide surface 53, the inclined direction of the inclined guide surface 53 is inclined from the bottom to the obliquely upward direction, and the inclined guide surface 53 forms an acute angle β with the center axis of the connecting rod portion 52. The angle β is between 50 and 80 degrees, and is actually determined according to the inclination direction of the flow channel outlet 12. When the valve is in the open state, the inclined guide surface 53 points to the entrance position of the flow channel outlet 12. The inclined guide surface 53 avoids the problems of a sharp increase in resistance and eddy turbulence caused by a sudden change in the flow direction of the medium, optimizes the force guiding direction of the fluid, enhances the smoothness of the fluid steering, and effectively reduces energy loss and wear of valve components, thereby ensuring the stable operation of the regulating valve under a special flow channel layout. In addition, in order to facilitate manufacturing, the valve body 1 can be set as a split structure, and the flow channel outlet 12 position and the main body of the valve body 1 can be separated and disassembled from each other. According to the actual scene requirements, the inclination angle of the flow channel outlet 12 will be different. Therefore, a split component of the valve body 1 with a corresponding inclination at the flow channel outlet 12 position can be selected.

[0019] The existing valve core 5 and valve stem 4 are connected by threaded connection or clamping ring, and the valve core 5 may rotate. When the medium impacts the inclined guide surface 53, the valve core 5 is subjected to a large impact force, which will cause the valve core 5 to deflect. The inclined guide surface 53 deviates from the preset direction, which will cause the medium guiding direction to deviate. In order to prevent the above situation from happening, two fixing pins 41 are inserted into the connecting rod part 52 at the bottom end of the valve stem 4 and penetrate the connecting position of the two. The fixing pins 41 are arranged perpendicular to the central axis of the connecting rod part 52 and the two fixing pins 41 are distributed perpendicular to each other. The connection method of the valve stem 4 and the valve core 5 is changed, and the valve stem 4 and the connecting rod part 52 are firmly connected, ensuring that there will be no looseness, displacement deviation, etc. between the valve stem 4 and the connecting rod part 52 of the valve core 5 under frequent valve opening and closing actions and fluid impact, ensuring the accuracy and reliability of the movement of the valve core 5, and then ensuring the accuracy of the guidance of the inclined guide surface 53.

[0020] The sleeve 3 has a sliding hole 31 for the valve stem 4 and the connecting rod 52 to move through. Four axial guide grooves 32 are also provided on the wall of the sliding hole 31. Both ends of the fixing pin 41 extend into the corresponding axial guide grooves 32. The axial guide grooves 32 are arranged axially along the sliding hole 31, which limits the circumferential direction of the fixing pin 41, and further constrains the movement direction of the valve core 5, so that it can only move stably along the axial direction. In this way, the sleeve 3 is actually used to determine the installation direction of the valve core 5, thereby determining the inclination direction of the inclined guide surface 53, preventing the valve core 5 from being eccentric, shaking or other unstable states in the valve body 1, and helping the valve stem 4 to smoothly drive the valve core 5 to guide the fluid.

[0021] An extension tube 6 is also installed between the valve cover 2 and the valve body 1. The extension tube 6 is threadedly fixedly connected to the valve cover 2 and the valve body 1 respectively. The setting of the extension tube 6 is mainly to meet some special installation space requirements. A guide disc sleeve 61 is arranged at the contact position between the extension tube 6 and the valve cover 2. The guide disc sleeve 61 is sleeved on the valve stem 4 and slides with the valve stem 4. The outer edge of the guide disc sleeve 61 is cushioned between the extension tube 6 and the valve cover 2, and a sealing gasket 62 is installed at the contact position with the corresponding part above and below the guide disc sleeve 61. The guide disc sleeve 61 is in the middle position in the height direction of the valve body 1, the extension tube 6, and the valve cover 2. This position is more effective in guiding the valve stem 4. The guide disc sleeve 61 can provide stable support and guidance for the up and down movement of the valve stem 4, prevent the valve stem 4 from deflecting, and ensure the accuracy of the valve stem 4 driving the valve core 5. In addition, its outer edge is cushioned between the extension tube 6 and the valve cover 2 and matched with the sealing gasket 62, which effectively prevents the medium from leaking from the connection between the valve cover 2 and the valve body 1.

Claims

1. A special-shaped single-seat regulating valve, comprising a valve body (1), a valve cover (2) mounted above the valve body (1), a sleeve (3) fixedly mounted in the valve body (1), a valve stem (4) movably penetrating the valve cover (2) and the sleeve (3), and a valve core (5) connected to the bottom end of the valve stem (4), the valve core (5) comprising a lower opening and closing portion (51) and a connecting rod portion (52), the valve body (1) having a flow channel inlet (11) and a flow channel outlet (12), characterized in that: The center direction of the flow channel outlet (12) and the center direction of the flow channel inlet (11) are located on different axes, and the center direction of the flow channel outlet (12) is inclined downward; the bottom surface of the opening and closing portion (51) forms an inclined guide surface (53), and the inclined direction of the inclined guide surface (53) is inclined from the bottom to the oblique upward direction, and the inclined guide surface (53) forms an acute angle with the center axis of the connecting rod portion (52).

2. The special-shaped single-seat regulating valve according to claim 1 is characterized in that: The bottom end of the valve stem (4) is inserted into the connecting rod portion (52) and two fixing pins (41) are provided through the connecting position of the two. The fixing pins (41) are provided perpendicular to the central axis of the connecting rod portion (52) and the two fixing pins (41) are distributed perpendicular to each other.

3. The special-shaped single-seat regulating valve according to claim 2 is characterized in that: The sleeve (3) has a sliding hole (31) for the valve stem (4) and the connecting rod portion (52) to movably penetrate therethrough. The sliding hole (31) is also provided with four axial guide grooves (32) on the wall thereof. Both ends of the fixing pin (41) extend into corresponding axial guide grooves (32).

4. The special-shaped single-seat regulating valve according to claim 1 or 3, characterized in that: An extension tube (6) is also installed between the valve cover (2) and the valve body (1). The extension tube (6) is threadedly fixedly connected to the valve cover (2) and the valve body (1) respectively. A guide disc sleeve (61) is provided at the contact position between the extension tube (6) and the valve cover (2). The guide disc sleeve (61) is externally mounted on the valve stem (4) and is slidably engaged with the valve stem (4). The outer edge of the guide disc sleeve (61) is cushioned between the extension tube (6) and the valve cover (2), and sealing gaskets (62) are installed at the upper and lower contact positions of the guide disc sleeve (61).

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