Three-way shunting and converging integrated pipeline angle valve

Abstract

The invention relates to a three-way shunting and converging integrated pipeline angle valve which comprises a three-way pipe, valve bodies are connected to the two sides of the three-way pipe, valve seats are arranged between the three-way pipe and the valve bodies, and a valve rod and a valve element which are connected are arranged in the valve bodies. A sealing cavity, a main flow channel and an auxiliary flow channel which are sequentially communicated are arranged in the valve body, the valve rod slides in the sealing cavity and the main flow channel, the valve element slides in the main flow channel, and a packing pad, a graphite packing, a guide sleeve, a first graphite packing set, a packing spacer bush and a second graphite packing set are sequentially installed in the sealing cavity from inside to outside and fixed through a packing gland and a packing pressing plate. The three-way pipe is of a T-shaped structure, the 135-degree low-flow-resistance valve body is matched with the two manual flushing valves, and the valve is excellent in anti-blocking and anti-jamming performance.

Description

Technical Field

[0001] The invention belongs to the technical field of valves and relates to a three-way flow dividing and converging integrated pipeline angle valve. Background Art

[0002] PTA is the abbreviation of purified terephthalic acid, which is an important bulk organic raw material. At present, the mainstream PTA production process in the market mainly adopts the two-step method of PX oxidation and TA refining. TA refining is to dissolve the crude TA transported from the oxidation device in water, and carry out hydrogenation reaction under high temperature and high pressure conditions, thereby converting the main impurity p-carboxybenzaldehyde (4-CBA) into p-toluic acid (Pt acid). Because the solubility of Pt acid in water is higher than that of PTA, PTA can be produced through processes such as crystallization, liquid-solid separation and drying.

[0003] In the liquid-solid separation stage, the pressurized rotary drum filter (RPF) is mainly used to separate the filter cake and the mother liquor. After further pulping, the filter cake will enter the rotary vacuum filter and filter. The traditional filter inlet confluence and outlet diversion pipelines are respectively equipped with three-way plunger valves or ball valves of different structures to control the switch of the slurry medium. However, during use, valve blockage, jamming, packing leakage, loose closure and other abnormal conditions are prone to occur, which seriously affect the safe and stable operation of the device; and most valves are imported products with various structural types, and the product procurement and maintenance costs are high, resulting in a decline in the company's operating efficiency. Summary of the invention

[0004] The object of the present invention is to provide a three-way integrated flow dividing and converging pipeline angle valve, which can solve the above-mentioned problems and has good convenience for disassembly, assembly and maintenance.

[0005] According to the technical solution provided by the present invention: a three-way type integrated flow separation and confluence pipeline angle valve, including a three-way pipe, the two sides of the three-way pipe are connected to the valve body, a valve seat is provided between the three-way pipe and the valve body, and a valve stem and a valve core connected to each other are provided in the valve body; a sealing cavity, a main flow channel, and a secondary flow channel connected in sequence are provided in the valve body, the valve stem slides in the sealing cavity and the main flow channel, and the valve core slides in the main flow channel, and a packing pad, a graphite packing, a guide sleeve, a first graphite packing group, a packing spacer, and a second graphite packing group are installed in the sealing cavity from the inside to the outside, and are fixed by a packing gland and a packing pressure plate.

[0006] As a further improvement of the present invention, the packing pressure plate is fastened to the valve body through a pressure plate stud and a pressure plate nut, and the packing pressure plate presses the second graphite packing group through a packing gland.

[0007] As a further improvement of the present invention, the included angle between the main flow channel and the secondary flow channel is 135°.

[0008] As a further improvement of the present invention, a first O-ring and a second O-ring are respectively provided on the inner diameter and the outer diameter of the packing gland.

[0009] As a further improvement of the present invention, a first guide belt is provided in the guide sleeve, and a second guide belt is provided in the packing gland.

[0010] As a further improvement of the present invention, the first guide belt and the second guide belt are both made of non-metallic wear-resistant material.

[0011] As a further improvement of the present invention, the main flow channel and the valve core are clearance-fitted.

[0012] As a further improvement of the present invention, the valve stem is driven by an electric actuator; the electric actuator includes a driving rod, and the driving rod is connected to the end of the valve stem through a coupling; a thread is provided at the outer end of the valve stem, and a tightening nut is sleeved on the thread, and the tightening nut is tightly attached to the coupling; a keyway is provided on the outer end of the valve stem and the coupling, and an anti-rotation key is placed in the keyway.

[0013] As a further improvement of the present invention, the tee is a T-shaped structure, and the tee is provided with a first channel, a second channel, and a third channel that are connected to each other. The first channel is located between the second channel and the third channel, and the second channel and the third channel are connected to the valve body through a valve seat; the tee is connected to the valve body through a tee fastener.

[0014] As a further improvement of the present invention, a first manual flushing valve and a second manual flushing valve are provided on the valve body, the output port of the first manual flushing valve faces the secondary flow channel, and the output port of the second manual flushing valve faces the outer port of the primary flow channel.

[0015] The positive effects of this application are: 1. The three-way pipe has a T-shaped structure, a 135° low flow resistance valve body, and is equipped with two manual flushing valves. The valve has excellent anti-blocking and anti-jamming performance.

[0016] 2. The valve core and valve stem are integrated, the valve core is a disc structure, and the valve stem diameter is greatly reduced compared to the traditional plunger valve shaft diameter, making it easier to achieve sealing.

[0017] 3. The valve packing adopts double-layer graphite packing group and O-ring multiple redundant seals, which can effectively cope with slurry medium working conditions and has good packing sealing reliability.

[0018] 4. The valve adopts a double-guide design for the valve stem and the outer circle of the valve core, with good parts repeat positioning accuracy and high valve sealing level, which can meet Class VI requirements for a long time.

[0019] 5. The valve can satisfy both diversion and confluence functions, and has a single structure type, which can effectively reduce the purchase and maintenance costs of the valve.

[0020] 6. The valve body and the three-way pipe are split structures, which are convenient for disassembly and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is the main sectional view of the present invention.

[0022] Figure 2 It is a top sectional view of the present invention.

[0023] Figure 3 It is a side view of the present invention.

[0024] Figure 4 Axial section view of the valve body.

[0025] Figure 5 This is an axonometric view of the valve core and valve stem.

[0026] Figure 6 for Figure 1 Enlarged view of point Ⅰ.

[0027] Figure 7 This is a schematic diagram of the flow diversion principle of the present invention.

[0028] Figure 8 This is a schematic diagram of the confluence principle of the present invention.

[0029] Figure 1-Figure 8 The invention comprises 1-tee pipe, 2-tee pipe fastener, 3-first valve seat gasket, 4-valve seat, 5-second valve seat gasket, 6-valve seat fastening screw, 7-valve body, 8-electric actuator, 9-valve core, 10-second manual flushing valve, 11-valve stem, 12-packing pad, 13-graphite packing, 14-guide sleeve, 15-first guide belt, 16-first graphite packing group, 17-packing spacer, 18-second graphite packing group, 19-packing gland, 20-second guide belt, 21-first O-ring, 22-second O-ring, 23-packing pressure plate, 24-pressure plate stud, 25-pressure plate nut, 26-tightening nut, 27-anti-rotation key, 28-first manual flushing valve, etc. DETAILED DESCRIPTION

[0030] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0031] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment 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 making creative work should fall within the scope of protection of the present invention.

[0032] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so as to describe the embodiments of the present invention described herein. In addition, similar terms such as "including" and "having" mean that in addition to those contents already listed in "including" and "having", other contents that have not been listed may also be "included" and "having"; for example, a process, method, system, product or device that may include a series of steps or units is not necessarily limited to those steps or units that have been clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0033] Due to the angle of the drawing, some components may not be drawn, but their positions and connection relationships can be partially understood based on the text expression.

[0034] like Figure 1-Figure 3 As shown, the present invention is a three-way type integrated pipeline angle valve for flow separation and confluence, comprising a three-way pipe 1, with valve bodies 7 connected on both sides of the three-way pipe 1, a valve seat 4 is provided between the three-way pipe 1 and the valve body 7, and a valve stem 11 and a valve core 9 connected thereto are provided in the valve body 7.

[0035] like Figure 4 As shown, the valve body 7 is provided with a sealing cavity, a main flow channel 7-1, and a secondary flow channel 7-2 which are connected in sequence, the valve stem 11 slides in the sealing cavity and the main flow channel 7-1, the valve core 9 slides in the main flow channel 7-1, and the sealing cavity is sequentially installed with a packing pad 12, a graphite packing 13, a guide sleeve 14, a first graphite packing group 16, a packing spacer 17, and a second graphite packing group 18 from the inside to the outside. Figure 6 As shown, the multiple redundant sealing design has good packing sealing reliability and can meet the low fugitive emission requirements for a long time; and is fixed by the packing gland 19 and the packing plate 23. Specifically, the packing plate 23 is fastened to the valve body 7 by the plate stud 24 and the plate nut 25, and the packing plate 23 presses the second graphite packing group 18 through the packing gland 19.

[0036] The included angle between the main flow channel 7-1 and the secondary flow channel 7-2 is 135°, and the flow resistance is small.

[0037] A first O-ring 21 and a second O-ring 22 are respectively provided on the inner diameter and the outer diameter of the packing gland 19 . The first O-ring 21 seals the gap between the packing gland 19 and the valve stem 11 , and the second O-ring 22 seals the gap between the packing gland 19 and the valve body 7 .

[0038] A first guide band 15 is provided in the guide sleeve 14, and a second guide band 20 is provided in the packing gland 19. Both the first guide band 15 and the second guide band 20 are made of non-metallic wear-resistant materials. The first guide band 15 and the second guide band 20 can provide guidance for the valve stem 11 and prevent the valve stem 11 from getting stuck during movement; the main flow channel 7-1 and the valve core 9 are clearance-matched, which also plays a guiding role; the double guide design can improve the repeated positioning accuracy of the parts, and the valve has a high sealing grade and can meet Class VI requirements for a long time.

[0039] The valve stem 11 is driven by the electric actuator 8. Specifically, the electric actuator 8 includes a driving rod, and the driving rod is connected to the end of the valve stem 11 through a coupling.

[0040] In order to ensure the stability of the connection, a thread is provided at the outer end of the valve stem 11, and a tightening nut 26 is sleeved on the thread, and the tightening nut 26 is tightly attached to the coupling.

[0041] In order to prevent the valve stem 11 from rotating, a keyway is provided on the outer end of the valve stem 11 and the coupling, and an anti-rotation key 27 is placed in the keyway. Figure 5 shown.

[0042] The tee pipe 1 is a T-shaped structure, and is provided with a first channel, a second channel, and a third channel connected to each other, the first channel is located between the second channel and the third channel, and the second channel and the third channel are connected to the valve body 7 through the valve seat 4. The first channel, the second channel, and the third channel are the inlet or outlet of the slurry medium, and have good flow capacity, which can effectively prevent pipeline blockage.

[0043] The three-way pipe 1 is connected to the valve body 7 via a three-way pipe fastener 2 .

[0044] A first valve seat gasket 3 is provided between the valve seat 4 and the tee pipe 1 for plane sealing; a second valve seat gasket 5 is provided between the valve seat 4 and the valve body 7 for plane sealing; the valve seat 4 and the valve body 7 are connected with a valve seat fastening screw 6 to prevent loosening.

[0045] The valve core 9 and the valve stem 11 are integrated; the valve core 9 is a disc structure. Compared with the traditional plunger valve, the sealing shaft diameter of the valve stem 11 is greatly reduced, which is only 20% to 30% of the valve stem shaft diameter of the same caliber plunger valve, making it easier to achieve sealing.

[0046] The valve body 7 is provided with a first manual flushing valve 28 and a second manual flushing valve 10, which are convenient for flushing the slurry medium and preventing the valve cavity from being blocked and the valve core 9 from being stuck. The output port of the first manual flushing valve 28 is toward the secondary flow channel 7-2, and the output port of the second manual flushing valve 10 is toward the outer port of the main flow channel 7-1.

[0047] like Figures 7-8As shown, when the valve is used as a diverter valve, the valve core 9 is opened, and the slurry medium flows from the A side to the B side and the C side; when the valve is used as a converging valve, the valve core 9 is opened, and the slurry medium flows from the B side and the C side to the A side; the valve is a three-way type diverter and converging integrated structure.

[0048] like Figure 7-Figure 8 As shown, the valve body 7 and the three-way pipe 1 of the valve are of split structure, which is convenient for later disassembly and maintenance.

[0049] The working principle of the present invention is: the valve is installed on the pipeline. When the valve is used as a diverter valve, the electric actuator 8 drives the valve stem 11 and the valve core 9 to move linearly, the valve core 9 opens, and the slurry medium flows from the A side to the B side and the C side; when the valve is used as a converging valve, the electric actuator 8 drives the valve stem 11 and the valve core 9 to move linearly, the valve core 9 opens, and the slurry medium flows from the B side and the C side to the A side; the valve can realize the three-way diverter and converging functions. The three-way pipe 1 is a T-shaped structure with good flow capacity to prevent pipeline blockage. The angle of the valve body 7 is 135°, the flow resistance is small, and it is not easy to block; but when the inner cavity of the valve body 7 is blocked by slurry, the first manual flushing valve 28 and the second manual flushing valve 10 can be opened for flushing to prevent the valve from being stuck. The valve body 7 is provided with a valve core 9 and a valve stem 11, wherein the valve core 9 is a disc structure. Compared with the traditional plunger valve, the valve stem seal shaft diameter is greatly reduced, which is only 20% to 8% of the valve stem shaft diameter of the same caliber plunger valve, making it easier to achieve sealing. The valve body 7 is provided with a packing spacer 17 and a packing gland 19. The first graphite packing group 16 and the second graphite packing group 18 are installed on both sides of the packing spacer 17, and the first O-ring 21 and the second O-ring 22 are respectively provided inside and outside the packing gland 19. The multiple redundant sealing design has good packing sealing reliability, which can effectively cope with the working conditions containing solid media, ensuring that the valve can meet the low fugitive emission requirements for a long time. A guide sleeve 14 and a packing gland 19 are provided in the valve body 7. A first guide belt 15 is provided in the guide sleeve 14. A second guide belt 20 is provided in the packing gland 19. Both the first guide belt 15 and the second guide belt 20 are made of non-metallic wear-resistant materials. The first guide belt 15 and the second guide belt 20 can provide guidance for the valve stem 11 and prevent the valve stem 11 from getting stuck. A main flow channel 7-1 is provided in the valve body 7. The main flow channel 7-1 can provide guidance for the valve core 9. When the electric actuator 8 drives the valve stem 11 and the valve core 9 to perform a switch action, the double guide design can improve the repeated positioning accuracy of the parts and ensure that the valve can meet the Class VI sealing level requirements for a long time.

[0050] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A three-way flow dividing and converging integrated pipeline angle valve, characterized in that: The invention comprises a three-way pipe (1), the two sides of the three-way pipe (1) are connected to a valve body (7), a valve seat (4) is arranged between the three-way pipe (1) and the valve body (7), and a valve stem (11) and a valve core (9) connected to each other are arranged in the valve body (7); a sealing cavity, a main flow channel (7-1), and a secondary flow channel (7-2) are arranged in the valve body (7), the valve stem (11) slides in the sealing cavity and the main flow channel (7-1), and the valve core (9) slides in the main flow channel (7-1); a packing pad (12), a graphite packing (13), a guide sleeve (14), a first graphite packing group (16), a packing spacer (17), and a second graphite packing group (18) are installed in the sealing cavity from the inside to the outside, and are fixed by a packing gland (19) and a packing pressure plate (23).

2. The three-way flow dividing and converging integrated pipeline angle valve according to claim 1, characterized in that: The packing pressure plate (23) is fastened to the valve body (7) via a pressure plate stud (24) and a pressure plate nut (25), and the packing pressure plate (23) presses the second graphite packing group (18) via a packing gland (19).

3. The three-way flow dividing and converging integrated pipeline angle valve according to claim 1, characterized in that: The angle between the main flow channel (7-1) and the secondary flow channel (7-2) is 135 degrees.

4. The three-way flow dividing and converging integrated pipeline angle valve according to claim 1, characterized in that: The inner diameter and outer diameter of the packing gland (19) are respectively provided with a first O-ring (21) and a second O-ring (22).

5. The three-way flow dividing and converging integrated pipeline angle valve according to claim 1, characterized in that: A first guide belt (15) is provided in the guide sleeve (14), and a second guide belt (20) is provided in the packing gland (19).

6. The three-way flow dividing and converging integrated pipeline angle valve according to claim 5, characterized in that: The first guide belt (15) and the second guide belt (20) are both made of non-metallic wear-resistant materials.

7. The three-way flow dividing and converging integrated pipeline angle valve according to claim 5, characterized in that: The main flow channel (7-1) and the valve core (9) are clearance-fitted.

8. The three-way flow dividing and converging integrated pipeline angle valve according to claim 1, characterized in that: The valve stem (11) is driven by an electric actuator (8); the electric actuator (8) comprises a driving rod, and the driving rod is connected to the end of the valve stem (11) via a coupling; the outer end of the valve stem (11) is provided with a thread, and a tightening nut (26) is sleeved on the thread, and the tightening nut (26) is tightly attached to the coupling; the outer end of the valve stem (11) and the coupling are provided with a keyway, and an anti-rotation key (27) is placed in the keyway.

9. The three-way flow dividing and converging integrated pipeline angle valve according to claim 1, characterized in that: The three-way pipe (1) is a T-shaped structure. The three-way pipe (1) is provided with a first channel, a second channel, and a third channel that are connected to each other. The first channel is located between the second channel and the third channel. The second channel and the third channel are connected to the valve body (7) via a valve seat (4). The three-way pipe (1) and the valve body (7) are connected via a three-way pipe fastener (2).

10. The three-way flow dividing and converging integrated pipeline angle valve according to claim 1, characterized in that: A first manual flushing valve (28) and a second manual flushing valve (10) are provided on the valve body (7); an output port of the first manual flushing valve (28) faces the secondary flow channel (7-2), and an output port of the second manual flushing valve (10) faces the external port of the primary flow channel (7-1).

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