Control valve with adaptive rectification structure

Abstract

The present invention discloses a regulating valve with an adaptive rectifying structure, which belongs to the field of valve technology. By improving the existing ordinary labyrinth sleeve, a plurality of baffles are fixedly distributed in an annular manner between the upper and lower positioning plates, and the plurality of baffles divide the annular cavity formed between the upper and lower diverter discs into a plurality of flow grooves extending from the inside to the outside. When the valve core is lifted upward to open, a plurality of groups of flow grooves are opened in sequence from bottom to top to complete the balanced diversion of the medium in the annular direction. The diverter disc and the baffle are slidably installed, and a limiting structure composed of a plurality of annularly distributed limiting plates and elastic ring sleeves is provided between adjacent diverter discs, so that each diverter disc has a small upward movement range, so that in actual use, the size of the flow groove can be adaptively adjusted from bottom to top according to different flow velocities of the fluid, and the workload of the moving parts inside the valve body due to the instantaneous opening flow pressure of the fluid is effectively avoided.

Description

Technical Field

[0001] The present invention relates to the field of valve technology, and more particularly to a regulating valve with an adaptive rectifying structure. Background Art

[0002] A regulating valve is a valve used to adjust process parameters such as medium flow, pressure, temperature, liquid level, etc. in the field of industrial automation process control. It automatically adjusts the valve opening according to the control signal in the automation system, thereby achieving the regulation of medium flow, pressure, temperature and liquid level.

[0003] At present, high-pressure regulating valves are classified according to the form of valve internals into: multi-stage high-pressure regulating valves, labyrinth-type high-pressure regulating valves and single-seat sleeve-loaded high-pressure regulating valves, etc. Among them, the labyrinth-type high-pressure regulating valve is used to divert the fluid by setting a number of labyrinth flow channels on the labyrinth sleeve, while the adjacent labyrinth discs of the ordinary labyrinth regulating valve are fixedly installed, resulting in the same size of the labyrinth flow channel spacing. Therefore, for media with different flow and pressure sizes, its pressure relief and rectification capacity remains unchanged and cannot be adaptively adjusted. For flow regulating valves using high-pressure fluids, the workload of the moving parts inside the valve body will increase.

[0004] Therefore, we propose a regulating valve with an adaptive rectification structure according to the existing valve usage. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that the labyrinth flow channel arranged on the ordinary labyrinth regulating valve is difficult to perform adaptive rectification and adjustment for media with different flow and pressure sizes due to the fixed space size. Compared with the prior art, a regulating valve with an adaptive rectification structure is provided. By arranging the stacked diverter discs to be sliding, the spacing between the flow grooves is adjusted during the gradual upward lifting of the valve core, and the size of the open flow space of the flow groove can be adaptively adjusted according to the different flow rates of the fluid.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A regulating valve with an adaptive rectifying structure comprises a valve body, a driving mechanism and a central flow channel opened inside the valve body, a valve seat is embedded and installed inside the valve body corresponding to the middle section of the central flow channel, an inner flow dividing cylinder connected with the valve seat is fixedly installed on the valve seat, a labyrinth sleeve connected with the inner flow dividing cylinder is fixedly sleeved at the lower end of the inner flow dividing cylinder, a valve stem extending to the inside of the valve body is fixed at the driving end of the driving mechanism, and a valve core penetrating the inner flow dividing cylinder and extending to the valve seat is fixed at the lower end of the valve stem;

[0008] The labyrinth sleeve includes an upper positioning plate and a lower positioning plate which are arranged in the up and down directions and fixedly mounted on the inner diverter tube, the lower positioning plate is fixed to the upper end surface of the valve seat, and a plurality of baffles which are annularly distributed on the outside of the inner diverter tube are provided between the upper positioning plate and the lower positioning plate, and diverter discs which are slidably embedded and installed on the plurality of baffles and are sleeved on the outside of the inner diverter tube and are evenly spaced up and down, an annular cavity is formed between the upper positioning plate and the topmost diverter disc, the lower positioning plate and the bottommost diverter disc, and two adjacent diverter discs, the multiple baffles divide the annular cavity into a plurality of flow grooves, and each of the baffles is also provided with a limiting structure for limiting the position of the plurality of diverter discs.

[0009] Furthermore, the upper positioning piece, the lower positioning piece and the diverter disc are all annular structures, and the inner diameters of the upper positioning piece, the lower positioning piece and the diverter disc are all consistent with the outer diameter of the inner diverter tube, and the length of the baffle is less than the radius length of the diverter disc;

[0010] Furthermore, the baffle is a bending structure extending from the inside to the outside, and the diversion disc is provided with a plurality of bending movable grooves for the baffle to pass through. The baffle is arranged as a non-linear bending structure, which is beneficial to the bending and guiding effect on the fluid medium, to a certain extent reducing the release pressure of the fluid medium when it is just released, and reducing the medium flushing flow rate.

[0011] Furthermore, a plurality of diversion slots are provided on the outer end wall of the inner diversion cylinder in the vertical direction and are interconnected with the upper and lower groups of flow slots. The height of the diversion slots is consistent with the distance between the upper positioning plate and the lower positioning plate. The labyrinth sleeve is installed at the lower end of the inner diversion cylinder. When the valve core is gradually opened upward, the flow slots are opened layer by layer from bottom to top to discharge the medium.

[0012] Furthermore, the limiting structure includes a plurality of limiting plates fixedly installed on the baffle at equal intervals, each of the limiting plates is located at the top of each flow slot, and the outer end of the baffle is also provided with a plurality of elastic ring sleeves movably distributed at equal intervals and located inside the flow slot and below the limiting plate.

[0013] Furthermore, a positioning rod of the same width as the baffle is embedded and installed on the outer end portion of each baffle, the limit plate is fixedly sleeved on the positioning rod, the elastic ring sleeve is movably sleeved on the positioning rod, and the outer end wall of the baffle is provided with a through groove for the elastic ring sleeve to movably pass through. By adding a limit plate and an elastic ring sleeve inside each flow slot, each limit plate limits the upward movement distance of each diverter disc, and the added elastic ring sleeve is beneficial to play an elastic buffering role for the upward movement of the diverter disc.

[0014] Furthermore, a lower sealing sleeve is installed above the labyrinth sleeve, which is located inside the valve body and sealingly sleeved on the outside of the inner diverter sleeve, and the lower end of the lower sealing sleeve is sealingly docked with the upper positioning piece.

[0015] Furthermore, an upper sealing sleeve which is also installed inside the valve body is fixedly installed on the upper end of the lower sealing sleeve, and a sealing sleeve which is connected to the outside of the valve stem is fixedly installed at the center of the upper sealing sleeve.

[0016] Compared with the prior art, the advantages of the present invention are:

[0017] (1) This scheme improves the existing common labyrinth sleeve. A plurality of baffles are fixedly distributed in an annular manner between the upper and lower positioning plates. The flow dividing discs stacked up and down are slidably embedded in the baffles. The plurality of baffles divide the annular cavity formed between the upper and lower flow dividing discs into a plurality of flow grooves extending from the inside to the outside. When the valve core is lifted upward to open, the plurality of flow grooves are opened in sequence from bottom to top to complete the balanced flow division of the fluid medium in the annular direction. The flow dividing discs and the baffles are slidably installed. When the valve core is gradually lifted upward, the lowest flow dividing disc slides upward along the plurality of baffles due to the impact of the fluid, and the spacing between the flow grooves is adjusted. The size of the flow opening space of the flow grooves can be adaptively adjusted according to the different flow rates of the fluid, effectively avoiding the increase in the workload of the moving parts inside the valve body due to the instantaneous flow opening pressure of the fluid.

[0018] (2) The present solution also provides a plurality of annularly distributed limit plates and elastic ring sleeve matching structures between adjacent diverter discs. The limit plates are used to limit the upward movement distance of each diverter disc. When the lowest diverter disc moves upward until it contacts the limit plate corresponding to its position, the diverter disc above it also moves upward a certain distance as the valve core gradually opens upward, so that each diverter disc has a small upward movement range. Compared with the existing labyrinth sleeve composed of a plurality of stacked and fitted diverter discs, the stacked multiple diverter discs in the present solution are spaced apart due to the plurality of limit plates, which reduces the mutual influence of adjacent diverter discs during the upward movement. Therefore, in actual use, the size of the open flow space of the flow slot can be adaptively adjusted from bottom to top within a certain range according to the different flow velocities of the fluid. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the external structure of the present invention;

[0020] Figure 2 is an internal cross-sectional view of the present invention;

[0021] Figure 3 is a cross-sectional view of the present invention;

[0022] Figure 4 It is a schematic diagram of the structure of the junction between the labyrinth sleeve, the valve core and the inner flow dividing cylinder of the present invention;

[0023] Figure 5It is a disassembled view of the junction of the labyrinth sleeve and the inner diverter cylinder of the present invention;

[0024] Figure 6 It is a schematic diagram of the structure of the labyrinth sleeve of the present invention;

[0025] Figure 7 It is a side cross-sectional view of the combination of the labyrinth sleeve and the inner diverter cylinder of the present invention;

[0026] Figure 8 It is a top cross-sectional view of the combination of the labyrinth sleeve and the inner diverter cylinder of the present invention;

[0027] Fig. 9 It is a structural schematic diagram of the junction of the baffle plate and the limiting structure of the present invention;

[0028] Fig.10 It is a top cross-sectional view of the junction between the labyrinth sleeve and the inner diverter cylinder of the present invention.

[0029] Description of the numbers in the figure:

[0030] Valve body; 2. Drive mechanism; 3. Central flow channel; 4. Valve seat; 5. Valve stem; 6. Valve core; 7. Internal diverter cylinder; 701. Diverter slot; 8. Labyrinth sleeve; 81. Upper positioning plate; 82. Lower positioning plate; 83. Diverter disc; 84. Baffle; 85. Positioning rod; 86. Limit plate; 87. Elastic ring sleeve; 9. Lower sealing sleeve; 10. Upper sealing sleeve. DETAILED DESCRIPTION

[0031] The following will combine the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all the embodiments. All other embodiments obtained by ordinary technicians in this field without creative work based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0032] Example 1: The present invention discloses a regulating valve with an adaptive rectifying structure, see Figure 1-Figure 4 , comprising a valve body 1, a driving mechanism 2 and a central flow channel 3 opened in the valve body 1, a valve seat 4 is embedded and installed in the valve body 1 at a position corresponding to the middle section of the central flow channel 3, an inner flow dividing tube 7 connected with the valve seat 4 is fixedly installed, a lower end of the inner flow dividing tube 7 is fixedly sleeved with a labyrinth sleeve 8 connected with the inner flow dividing tube 7, a valve stem 5 extending to the inside of the valve body 1 is fixed at the driving end of the driving mechanism 2, and a valve core 6 penetrating the inner flow dividing tube 7 and extending to the valve seat 4 is fixed at the lower end of the valve stem 5.

[0033] See also Figure 3A lower sealing sleeve 9 is installed above the labyrinth sleeve 8, which is located inside the valve body 1 and sealingly sleeved on the outside of the inner diversion sleeve 7. The lower end of the lower sealing sleeve 9 is sealingly docked with the upper positioning piece 81. An upper sealing sleeve 10, which is also installed inside the valve body 1, is fixedly installed on the upper end of the lower sealing sleeve 9. A sealing sleeve sealingly sleeved on the outside of the valve stem 5 is fixedly installed at the center of the upper sealing sleeve 10.

[0034] The driving mechanism 2 is used to drive the valve core 6 at the lower end of the valve stem 5 to move up and down to realize the opening of the through hole of the valve seat 4. The labyrinth sleeve 8 is installed at the lower end of the inner diverter cylinder 7. When the valve core 6 is gradually opened upward, the flow slots are opened layer by layer from bottom to top to discharge the medium.

[0035] See also Figure 4-Figure 7 The labyrinth sleeve 8 includes an upper positioning piece 81 and a lower positioning piece 82 which are arranged in the up-down direction and fixedly sleeved on the inner diverter tube 7. The lower positioning piece 82 is fixed to the upper end surface of the valve seat 4. A plurality of baffles 84 which are annularly distributed on the outside of the inner diverter tube 7 are provided between the upper positioning piece 81 and the lower positioning piece 82. Diverter discs 83 which are sleeved on the outside of the inner diverter tube 7 and are equally spaced up and down are slidably embedded and installed on the plurality of baffles 84. An annular cavity is formed between the upper positioning piece 81 and the uppermost diverter disc 83, the lower positioning piece 82 and the lowermost diverter disc 83, and two adjacent diverter discs 83. The plurality of baffles 84 divide the annular cavity into a plurality of flow slots.

[0036] The upper positioning piece 81, the lower positioning piece 82 and the diverter disc 83 are all annular structures, and the inner diameters of the upper positioning piece 81, the lower positioning piece 82 and the diverter disc 83 are all consistent with the outer diameter of the inner diverter tube 7. A plurality of diverter slots 701 interconnected with the upper and lower groups of flow slots are provided on the outer end wall of the inner diverter tube 7 in the vertical direction. The height of the diverter slot 701 is consistent with the distance between the upper positioning piece 81 and the lower positioning piece 82. The labyrinth sleeve 8 is installed at the lower end of the inner diverter tube 7. The diverter slot 701 is connected to the multiple groups of flow slots. When the valve core 6 is gradually opened upward, the diverter slot 701 is gradually opened, and the flow slots are opened layer by layer from bottom to top to discharge the medium.

[0037] See also Figure 7-Figure 8 The diverter disc 83 and the baffle plate 84 are installed by sliding. When the valve core 6 is gradually lifted upward, the lowest diverter disc 83 slides upward along the multiple baffle plates 84 due to the impact of the fluid, and the spacing between the flow grooves is adjusted. The size of the open flow space of the flow groove can be adaptively adjusted according to the different flow rates of the fluid.

[0038] The length of the baffle plate 84 is smaller than the radius of the diverter disc 83. The baffle plate 84 is a bending structure extending from the inside to the outside. The diverter disc 83 is provided with a plurality of bending movable grooves for the baffle plate 84 to pass through. The baffle plate 84 is set as a non-linear bending structure, which is beneficial to the bending and guiding effect on the fluid medium, and to a certain extent reduces the release pressure of the fluid medium when it is just released, thereby reducing the medium flushing flow rate.

[0039] Embodiment 2: Based on Embodiment 1, this embodiment further optimizes and improves the internal structure of the labyrinth sleeve 8, specifically including:

[0040] Each baffle plate 84 is also provided with a limiting structure for limiting the position of the plurality of flow dividing discs 83. The limiting structure includes a plurality of limiting plates 86 fixedly installed on the baffle plate 84 at equal intervals. Each limiting plate 86 is located at the top of each flow slot. A plurality of elastic rings 87 are also movably distributed at equal intervals on the outer end of the baffle plate 84 and are located inside the flow slot and below the limiting plates 86.

[0041] See also Figure 8-Figure 10 A positioning rod 85 having the same width as the baffle plate 84 is embedded and installed at the outer end of each baffle plate 84, a limiting plate 86 is fixedly sleeved on the positioning rod 85, an elastic ring sleeve 87 is movably sleeved on the positioning rod 85, and a through groove for the elastic ring sleeve 87 to movably penetrate is opened on the outer end wall of the baffle plate 84. By adding a limiting plate 86 and an elastic ring sleeve 87 inside each flow slot, each limiting plate 86 plays a role in limiting the upward movement distance of each diverter disc 83;

[0042] When the bottom diverter disc 83 moves upward until it contacts the limit plate 86 corresponding to its position, the diverter disc 83 above it also moves upward a certain distance during the process of the valve core 6 gradually opening upward, so that each diverter disc 83 has a small upward movement range. Compared with the existing labyrinth sleeve composed of multiple stacked and fitted diverter discs 83, the multiple stacked diverter discs 83 in this scheme are spaced apart by multiple limit plates 86, which reduces the mutual influence of adjacent diverter discs 83 during the upward movement. By changing the size of the spacing between single flow slots layer by layer from bottom to top, the size of the flow opening space of the flow slot can be adaptively adjusted from bottom to top within a certain range according to different flow velocities of the fluid, effectively avoiding the increase in the workload of the moving parts inside the valve body due to the instantaneous flow opening pressure of the fluid.

[0043] The newly added elastic ring sleeve 87 has elastic buffering performance. After the valve core 6 is opened upward, the fluid medium flows into the flow groove and exerts an upward squeezing effect on the diverter disc 83. Under the elastic action of the elastic ring sleeve 87, the diverter disc 83 slowly moves upward for a certain distance. After the valve core 6 moves downward and closes, the diverter disc 83 is reset downward under the elastic action of multiple elastic ring sleeves 87 to restore the initial flow groove space size.

[0044] In summary, the present invention improves the existing common labyrinth sleeve, and a plurality of baffles 84 are fixedly distributed in an annular manner between the upper positioning piece 81 and the lower positioning piece 82, and the flow dividing discs 83 stacked up and down are slidably embedded and installed with the baffles 84. The plurality of baffles 84 divide the annular cavity formed between the upper and lower flow dividing discs 83 into a plurality of flow grooves extending from the inside to the outside, and a positioning rod 85 fixed on the baffle 84 is provided at the top of each flow groove. When the valve core 6 is lifted upward to open, the plurality of flow grooves are opened in sequence from bottom to top to complete the balanced flow division of the medium in the annular direction.

[0045] The diverter disc 83 and the deflector plate 84 are slidably installed, and a plurality of annular limit plates 86 and elastic ring sleeves 87 are provided between adjacent diverter discs 83, so that the diverter disc 83 has a small upward movement range, thereby achieving the ability to adaptively adjust the size of the flow opening space of the flow groove according to the different flow rates of the fluid during actual use, effectively avoiding an increase in the workload of the moving parts inside the valve body due to the instantaneous opening pressure of the fluid.

[0046] The above are only preferred specific implementation modes of the present invention; however, the protection scope of the present invention is not limited thereto; any technician familiar with the technical field within the technical scope disclosed by the present invention; any equivalent replacement or change based on the technical solution and improved concept of the present invention shall be covered within the protection scope of the present invention.

Claims

1. A regulating valve with an adaptive rectifying structure comprises a valve body, a driving mechanism and a central flow channel opened inside the valve body, characterized in that: A valve seat is embedded and installed in the middle section of the central flow channel of the valve body, an inner flow dividing cylinder connected to the valve seat is fixedly installed on the valve seat, the lower end of the inner flow dividing cylinder is fixedly sleeved with a labyrinth sleeve connected to the inner flow dividing cylinder, a valve stem is installed at the driving end of the driving mechanism, and a valve core is fixed at the lower end of the valve stem that penetrates the inner flow dividing cylinder and extends to the valve seat; The labyrinth sleeve comprises an upper positioning piece and a lower positioning piece fixedly sleeved on the inner diverter tube in the upper and lower directions, a plurality of baffles annularly distributed on the outside of the inner diverter tube are arranged between the upper positioning piece and the lower positioning piece, and a plurality of baffles are slidably embedded with diverter discs sleeved on the outside of the inner diverter tube and distributed at equal intervals up and down, the upper positioning piece, the lower positioning piece and the diverter disc are all circular ring structures, and the inner diameters of the upper positioning piece, the lower positioning piece and the diverter disc are all consistent with the outer diameter of the inner diverter tube, the length of the baffle is less than the radius of the diverter disc, annular cavities are formed between the upper positioning piece and the topmost diverter disc, the lower positioning piece and the bottommost diverter disc, and two adjacent diverter discs, the multiple baffles divide the annular cavity into multiple flow slots, and each of the baffles is also equipped with a limiting structure for limiting the position of the multiple diverter discs; The limiting structure includes a plurality of limiting plates fixedly installed on the baffle at equal intervals, each of the limiting plates is located at the top of each flow slot, and the outer end of the baffle is also movably distributed with a plurality of elastic ring sleeves located inside the flow slot and below the limiting plate at equal intervals. A positioning rod of the same width as the baffle is embedded and installed on the outer end of each baffle, the limiting plate is fixedly sleeved on the positioning rod, the elastic ring sleeve is movably sleeved on the positioning rod, and the outer end wall of the baffle is provided with a through groove for the elastic ring sleeve to movably pass through.

2. The regulating valve with an adaptive rectifying structure according to claim 1, characterized in that: The baffle is a bent structure extending from the inside to the outside, and the diverter disc is provided with a plurality of bent movable grooves for the baffle to pass through.

3. The regulating valve with an adaptive rectifying structure according to claim 1, characterized in that: A plurality of flow dividing slots communicating with the upper and lower groups of flow slots are provided on the outer end wall of the inner flow dividing cylinder in the vertical direction, and the height of the flow dividing slots is consistent with the distance between the upper positioning piece and the lower positioning piece.

4. The regulating valve with an adaptive rectifying structure according to claim 1, characterized in that: A lower sealing sleeve is installed above the labyrinth sleeve and is located inside the valve body and sealingly sleeved on the outside of the inner diversion cylinder. The lower end of the lower sealing sleeve is sealingly docked with the upper positioning piece.

5. The regulating valve with an adaptive rectifying structure according to claim 4, characterized in that: An upper sealing sleeve which is also installed inside the valve body is fixedly installed on the upper end of the lower sealing sleeve, and a sealing sleeve which is connected to the outside of the valve stem is fixedly installed at the center of the upper sealing sleeve.

Images