Three-way adjusting control valve

Abstract

A three-way adjusting control valve is characterized in that a valve body is of a three-way structure and is provided with a feeding port B end, a discharging port C end and a discharging port D end, the included angle between the central axis of the C end and the central axis of the D end is 90 degrees, a valve element in the valve body is of a 1 / 4 conical plug body structure and is matched with the valve body in a rotating mode, the B end and the C end can be accurately adjusted to be communicated with the B end and the D end, the valve body and the valve element form a conical surface body sealing pair, and smoke pipeline reversing is completed by rotating the valve element by 90 degrees. A sealing gap between the valve body and the valve element is adjustable, a lower shaft and an adjusting shaft are arranged at the bottom of the valve body, the lower shaft and the adjusting shaft form a valve element floating structure through a T-shaped connector and are fixed, an adjusting base plate is in clearance fit with the adjusting shaft, and a first adjusting nut and a second adjusting nut on the adjusting shaft are used for driving the adjusting shaft to move longitudinally and be locked respectively. The sealing grade can be adjusted to be 1-5 according to the field working condition, the control valve can achieve accurate adjustment, and the functions of two adjusting valves, a three-way pipeline and a comprehensive signal control system are achieved at the same time.

Description

Technical Field

[0001] The invention relates to the technical field of valves, and in particular to a three-way regulating control valve. Background Art

[0002] The existing valve system used for flue gas pipeline reversal regulation mostly adopts a design that installs a regulating valve on each of the two pipes behind a three-way pipe to regulate the flow respectively, and also needs to perform signal control so that the sum of the flow of the two branches is consistent with the flow of the main pipe for comprehensive control. As a result, the existing solution actually requires two regulating valves and a three-way pipe, plus a comprehensive signal control system to implement, which is complex in structure and high in cost. Summary of the invention

[0003] In order to solve the technical defects in the prior art, the present invention provides a three-way regulating control valve.

[0004] The technical solution adopted by the present invention is: a three-way regulating control valve, including a valve body, the valve body is a three-way valve body with a feed port B end and a discharge port C end and a discharge port D end, a valve core is arranged in the valve body, the valve core is a 1 / 4 cone plug structure, and its 1 / 4 cone plug is a hollow structure, the valve core and the valve body are rotatably matched to realize the precise adjustment from the connection between the B and C ends to the connection between the B and D ends, and the flow rate of the port can be reduced during the reversing adjustment process to ensure that the flow rate of the port is increased, and the pressure and flow rate of the entire pipeline system can be ensured to be stable, the sealing surface of the valve body and the 1 / 4 cone plug of the valve core form a sealing secondary structure of a conical surface, the angle between the center axis of the discharge port C end and the D end is 90°, and the flue gas pipeline reversing adjustment is completed by rotating the 1 / 4 cone plug of the valve core by 90°, the sealing gap between the valve body and the valve core is adjustable, and the valve body and the valve core also include: A lower shaft, the lower shaft being arranged at the bottom of the valve core and being an integral structure with a 1 / 4 cone plug structure of the valve core (2); The adjusting shaft is arranged at the bottom of the valve body, and the upper end of the adjusting shaft is in contact with the lower end of the lower shaft. A T-shaped joint, wherein the T-shaped joint is arranged between the lower shaft and the adjusting shaft, and the upper end of the adjusting shaft and the lower end of the lower shaft are limited in the T-shaped joint to form a valve core floating structure and fixed by a stopper; The adjusting seat plate is arranged at the bottom of the valve body and is matched with the gap between the adjusting shaft. The adjusting shafts at the upper and lower ends of the adjusting seat plate are respectively provided with a first adjusting nut and a second adjusting nut for driving the longitudinal movement of the adjusting shaft. The first adjusting nut and the second adjusting nut drive the longitudinal movement of the adjusting shaft to realize the adjustable sealing gap between the valve core and the valve body. The specific adjustment method is as follows: the method of increasing the gap is to loosen the second adjusting nut, rotate the first adjusting nut, let the adjusting shaft rise, drive the valve core to move upward, increase the sealing gap between the valve core and the valve body, and after reaching the required leakage rate, tighten and lock the second adjusting nut. At this time, the adjusting shaft no longer rotates, and the adjusted sealing gap remains unchanged; the method of reducing the gap is to loosen the first adjusting nut, rotate the second adjusting nut, let the adjusting shaft descend, drive the valve core to move downward, and pull down the valve core to reduce the sealing gap between the valve core and the valve body. After reaching the required leakage rate, tighten and lock the first adjusting nut. At this time, the adjusting shaft no longer rotates, and the adjusted sealing gap remains unchanged. Increasing or reducing the gap between the valve core and the valve body sealing pair is operated within the range given by the design.

[0005] A packing pressing ring is arranged on the lower shaft, and the packing pressing ring is fixed on the valve body through a fastener, and packing and a packing pad are arranged between the packing pressing ring and the valve body.

[0006] The T-joint has an open groove structure at the side, the upper end of the adjusting shaft and the lower end of the lower shaft are installed in the T-joint through the open groove to form a valve core floating structure and are limited by a block at the open groove, and the block is welded to the T-joint.

[0007] It also includes a valve stem, which is connected to the upper part of the valve core. A limiting step is formed on the valve stem. A limiting ring is also provided on the valve stem. The limiting ring and the limiting step are limitedly matched. The limiting ring is fixed to the valve body by a fastener.

[0008] A packing is also arranged between the valve stem and the valve body, and a packing gland is arranged on the packing.

[0009] The sealing surface of the valve body is made of stainless steel, and the sealing surface of the 1 / 4 cone plug body of the valve core is hardened by Cr13, and the two form a sealing secondary structure with a hardness difference.

[0010] The top of the valve stem is connected with a worm gear box and an electric actuator.

[0011] The beneficial effects of the present invention are as follows: the present invention provides a three-way regulating control valve, comprising a valve body, wherein the valve body is a three-way valve body with a feed port B end and discharge ports C end and D end, a valve core is arranged in the valve body, and the valve core is a 1 / 4 cone plug structure, wherein the 1 / 4 cone plug is a hollow structure, and the valve core and the valve body are rotatably matched to realize precise adjustment from the connection between the B and C ends to the connection between the B and D ends, and the sealing surface of the valve body and the 1 / 4 cone plug of the valve core form a sealing secondary structure of a cone body, and the included angle between the center axis of the discharge port C end and the D end is 90°, and the flue gas pipeline reversal adjustment is completed by rotating the 1 / 4 cone plug of the valve core by 90°, and the reversal adjustment of the flue gas pipeline can be completed during the reversal adjustment process, and the flow rate of the port can be reduced just by increasing the flow rate of the port, so as to ensure the stability of the pressure and flow rate of the entire pipeline system, and the sealing gap between the valve body and the valve core is adjustable, and the sealing gap between the valve body and the valve core is also adjustable. The invention comprises a lower shaft, which is arranged at the bottom of the valve core and is an integral structure with the 1 / 4 cone plug structure of the valve core; the adjusting shaft is arranged at the bottom of the valve body, the upper end of the adjusting shaft contacts and cooperates with the lower end of the lower shaft, the T-joint is arranged between the lower shaft and the adjusting shaft, and the upper end of the adjusting shaft and the lower end of the lower shaft are limited in the T-joint to form a floating structure of the valve core and limited by a stopper; the adjusting seat plate is arranged at the bottom of the valve body and has a clearance fit with the adjusting shaft, and the adjusting shafts at the upper and lower ends of the adjusting seat plate are respectively provided with a first adjusting nut and a second adjusting nut for driving the longitudinal movement of the adjusting shaft, and the adjusting nut drives the longitudinal movement of the adjusting shaft to realize the adjustable sealing gap between the valve core and the valve body, and the invention realizes the precise adjustment of the three-way regulating control valve during the reversing process, and the combined action of the adjusting shaft, the first adjusting nut and the second adjusting nut and the adjusting seat plate are used. The sealing level can be adjusted between 1 and 5 levels according to the actual working conditions on site. The lower the sealing level, the more flexible the switch and the longer the service life; the higher the sealing level, the better the sealing effect. The adjustment is carried out according to the actual situation of the on-site production process, and the three-way regulating control valve of the present invention realizes the functions of two regulating valves, one three-way pipeline, and an integrated signal control system at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the present invention.

[0013] Figure 2 It is a top view of the midline section of the structure of the present invention.

[0014] Figure 3 It is a schematic diagram of the cone plug structure of 1 / 4 of the valve core of the present invention.

[0015] Figure 4 It is a top view of the tapered plug structure of 1 / 4 of the valve core of the present invention.

[0016] Figure 5 It is a schematic diagram of the T-joint structure of the present invention.

[0017] Figure 6It is a top view of the T-joint structure of the present invention.

[0018] Figure 7 This is an enlarged view of the structure at location A of the present invention.

[0019] Among them, 1-valve body, 2-valve core, 3-lower shaft, 4-adjusting shaft, 5-T-type joint, 6-adjusting seat plate, 7-valve stem, 8-worm gear box, 9-electric actuator, 31-packing pressure ring, 32-first packing, 33-packing pad, 41-first adjusting nut, 42-second adjusting nut, 51-stopper, 71-limiting ring, 72-second packing, 73-packing gland. DETAILED DESCRIPTION

[0020] The following will be combined with 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 of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] A three-way regulating control valve is used for flue gas pipeline reversing regulation, comprising a valve body 1, wherein the valve body 1 is a three-way valve body having a feed port B end and a discharge port C end and a discharge port D end, wherein a valve core 2 is arranged inside the valve body 1, wherein the valve core 2 is a 1 / 4 cone plug structure and is an integral structure with the lower shaft (3), wherein the 1 / 4 cone plug is also hollow, wherein the valve core 2 is rotatably matched with the valve body 1 to achieve precise regulation from the connection between the B and C ends to the connection between the B and D ends, wherein during the reversing regulation process, it can be ensured that the flow rate of the port is reduced just as the flow rate of the port is increased, and the pressure and flow rate of the entire pipeline system can be ensured to be stable, wherein the sealing surface of the valve body 1 and the 1 / 4 cone plug of the valve core 2 form a sealing secondary structure of a cone body, which is completely fitted and has a high sealing grade, and can reach a fifth-grade sealing grade at most. The sealing surface of the valve body 1 is made of stainless steel, and the sealing surface of the 1 / 4 cone plug of the valve core 2 is hardened with Cr13, and the two form a sealing secondary structure with a difference in hardness. The included angle between the center axis of the C end and the D end of the discharge port is 90°, and the flue gas pipeline reversing adjustment is completed by rotating the 1 / 4 cone plug of the valve core 2 by 90°. The sealing gap between the valve body 1 and the valve core 2 is adjustable, and a lower shaft 3 is also included between the valve body 1 and the valve core 2. The lower shaft 3 is arranged at the bottom of the valve core 2 and moves synchronously with the valve core 2; an adjusting shaft 4, the adjusting shaft 4 is arranged at the bottom of the valve body 1, and the upper end of the adjusting shaft 4 is in contact with the lower end of the lower shaft 3; a T-joint 5, the T-joint 5 is arranged between the lower shaft 3 and the adjusting shaft 4, and the upper end of the adjusting shaft 4 and the lower end of the lower shaft 3 are limited in the T-joint 5 to form a floating structure of the valve core 2 and are limited by a stopper 51; the T-joint 5 has an opening in a side open groove structure, and the upper end of the adjusting shaft 4 and the lower end of the lower shaft 3 are installed in the T-joint 5 through the open groove to form a floating structure of the valve core 2 and are limited by a stopper 51 at the open groove.The adjusting seat plate 6 is arranged at the bottom of the valve body 1 and has a clearance with the adjusting shaft 4. The adjusting shafts 4 at the upper and lower ends of the adjusting seat plate 6 are respectively provided with a first adjusting nut 41 and a second adjusting nut 42 which drive the longitudinal movement of the adjusting shaft 4. The first adjusting nut 41 and the second adjusting nut 42 drive the longitudinal movement of the adjusting shaft 4 to achieve an adjustable sealing gap between the valve core 2 and the valve body 1. The specific adjustment method is as follows: the method of increasing the gap is to loosen the second adjusting nut, rotate the first adjusting nut, let the adjusting shaft rise, drive the valve core to move upward, and increase the gap between the valve core and the valve The sealing gap between the valve body and the valve body is reduced by tightening the second adjusting nut after the required leakage rate is reached. At this time, the adjusting shaft no longer rotates, and the adjusted sealing gap remains unchanged. The method of reducing the gap is to loosen the first adjusting nut, rotate the second adjusting nut, let the adjusting shaft descend, drive the valve core to move downward, and pull down the valve core to reduce the sealing gap between the valve core and the valve body. After the required leakage rate is reached, the first adjusting nut is tightened and locked. At this time, the adjusting shaft no longer rotates, and the adjusted sealing gap remains unchanged. Increasing or reducing the gap between the valve core and the valve body sealing pair is operated within the given design range. The sealing level can be adjusted between 1 and 5 levels according to the actual working conditions on site. The lower the sealing level, the more flexible the switch and the longer the service life; the higher the sealing level, the better the sealing effect. Adjust according to the actual production process on site. The three-way regulating control valve of the present invention simultaneously realizes the functions of two regulating valves and one three-way pipeline, plus an integrated signal control system.

[0022] A packing pressing ring 31 is provided on the lower shaft 3 , and the packing pressing ring 31 is fixed on the valve body 1 through a fastener. A first packing 32 and a packing pad 33 are provided between the packing pressing ring 31 and the valve body 1 .

[0023] It also includes a valve stem 7, which is connected to the upper part of the valve core 2. A limiting step is formed on the valve stem 7. A limiting ring 71 is also provided on the valve stem 7. The limiting ring 71 is limitedly matched with the limiting step. The limiting ring 71 is fixed to the valve body 1 by fasteners.

[0024] A second packing 72 is provided between the valve stem 7 and the valve body 1 , and a packing gland 73 is provided on the second packing 72 .

[0025] The top of the valve stem 7 is connected to a worm gear box 8 and an electric actuator 9 .

[0026] Technical personnel should note: Although the present invention has been described according to the above-mentioned specific implementation methods, the inventive concept of the present invention is not limited to this invention. Any modification using the inventive concept will be included in the scope of protection of this patent. The up and down descriptions in the specification are based on the orientation descriptions in the main figure.

[0027] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A three-way regulating control valve, comprising a valve body (1), wherein the valve body (1) is a three-way valve body having a feed inlet end B and discharge outlet ends C and D, and is characterized in that: The valve body (1) is provided with a valve core (2), the valve core (2) is a 1 / 4 cone plug structure, and the 1 / 4 cone plug is a hollow structure. The valve core (2) and the valve body (1) are rotatably matched to achieve precise adjustment from the connection between the B and C ends to the connection between the B and D ends. The sealing surface of the valve body (1) and the 1 / 4 cone plug of the valve core (2) form a conical sealing secondary structure. The central axis of the C end and the D end of the discharge port is at an angle of 90°. The flue gas pipeline is switched by rotating the 1 / 4 cone plug of the valve core (2) by 90°. During the switching adjustment process, it can be ensured that the flow rate of the port is reduced just as the flow rate of the port is increased, and the pressure and flow of the entire pipeline system can be ensured to be stable. The sealing gap between the valve body (1) and the valve core (2) is adjustable. The valve body (1) and the valve core (2) also include: A lower shaft (3), wherein the lower shaft (3) is arranged at the bottom of the valve core (2) and is an integral structure with a 1 / 4 cone plug structure of the valve core (2); An adjusting shaft (4), wherein the adjusting shaft (4) is arranged at the bottom of the valve body (1), and the upper end of the adjusting shaft (4) is in contact with and fits with the lower end of the lower shaft (3). A T-shaped joint (5), wherein the T-shaped joint (5) is arranged between the lower shaft (3) and the adjusting shaft (4), and the upper end of the adjusting shaft (4) and the lower end of the lower shaft (3) are limited in the T-shaped joint (5) to form a floating structure of the valve core (2) and limited by a stopper (51), and the stopper (51) is welded to the T-shaped joint (5); An adjusting seat plate (6), wherein the adjusting seat plate (6) is arranged at the bottom of the valve body (1) and is clearance-matched with the adjusting shaft (4); the adjusting shafts (4) at the upper and lower ends of the adjusting seat plate (6) are respectively provided with a first adjusting nut (41) and a second adjusting nut (42) for driving the adjusting shaft (4) to move longitudinally; the first adjusting nut (41) and the second adjusting nut (42) drive the adjusting shaft (4) to move longitudinally to achieve an adjustable sealing gap between the valve core (2) and the valve body (1).

2. The three-way regulating control valve according to claim 1, characterized in that: A packing pressure ring (31) is provided on the lower shaft (3), and the packing pressure ring (31) is fixed to the valve body (1) via a fastener, and a first packing (32) and a packing gasket (33) are provided between the packing pressure ring (31) and the valve body (1).

3. The three-way regulating control valve according to claim 1, characterized in that: The T-shaped joint (5) has an open groove structure with an opening at the side, and the upper end of the adjusting shaft (4) and the lower end of the lower shaft (3) are installed in the T-shaped joint (5) through the open groove to form a valve core (2) floating structure and are limited by a stopper (51) at the open groove, and the stopper (51) is welded to the T-shaped joint (5).

4. The three-way regulating control valve according to claim 1, characterized in that: The valve body (1) further comprises a valve stem (7), wherein the valve stem (7) is connected to the upper part of the valve core (2), a limiting step is formed on the valve stem (7), a limiting ring (71) is also provided on the valve stem (7), the limiting ring (71) and the limiting step are in limiting cooperation with each other, and the limiting ring (71) is fixed to the valve body (1) by means of a fastener.

5. The three-way regulating control valve according to claim 1, characterized in that: A second packing (72) is provided between the valve stem (7) and the valve body (1), and a packing gland (73) is provided on the second packing (72).

6. The three-way regulating control valve according to claim 1, characterized in that: The sealing surface of the valve body (1) is made of stainless steel, and the sealing surface of the 1 / 4 cone plug of the valve core (2) is hardened by Cr13, and the two form a sealing pair structure with a hardness difference.

7. The three-way regulating control valve according to claim 1, characterized in that: The top of the valve stem (7) is connected to a worm gear box (8) and an electric actuator (9).

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