Oil coal slurry feeding line plunger valve core angle type regulating valve

Abstract

The utility model discloses an oil coal water slurry feed line plunger valve core angle type regulating valve, including valve body, valve core subassembly and actuating mechanism. The valve body is equipped with the horizontal liquid inlet flow channel and vertical liquid outlet flow channel who intercommunicate, forms the angle type flow channel structure. The inner wall of liquid inlet flow channel and liquid outlet flow channel is equipped with inlet bushing and outlet bushing respectively, and the upper end of outlet bushing is equipped with the valve seat. The top of valve body is connected through upper valve cover support, and is equipped with hydraulic actuating mechanism on the support. The valve core is the plunger type structure, and is connected with actuating mechanism through valve rod, can make the lifting movement along the guide bush. The packing system adopts the disc spring preloading structure, and the dynamic sealing reliability of valve rod is ensured. The utility model discloses through the angle type flow channel design reduction fluid impact, adopts the hard alloy bushing and the surface hardening valve core and improves the wear resistance, is applicable to the flow regulation of high pressure difference, high wear medium such as oil coal water slurry, has good sealing performance, long service life, and the advantages such as convenient maintenance.

Description

Technical Field

[0001] This utility model relates to the field of industrial valve technology, specifically an angle regulating valve for oil-coal slurry conveying pipelines in the fields of coal chemical industry and petrochemical industry, and particularly to an angle regulating valve with a plunger valve core for an oil-coal slurry feed line. Background Technology

[0002] Coal-oil slurry is a high-concentration solid-liquid two-phase fluid composed of pulverized coal, oil, and additives. It is characterized by strong corrosiveness, the presence of solid particles, and a tendency to settle and wear. Existing regulating valves used in coal-oil slurry pipelines often suffer from rapid valve core wear, poor sealing performance, and susceptibility to jamming. In particular, ordinary angle valves have a short service life under high pressure differential and high particle content conditions, requiring frequent replacement of internal components, increasing maintenance costs and downtime. Therefore, there is an urgent need for a specialized regulating valve that is highly wear-resistant, provides reliable sealing, and is easy to maintain. Utility Model Content

[0003] The purpose of this invention is to provide a plunger valve core angle regulating valve for oil-coal slurry feed lines. By optimizing the valve body structure, valve core guide, and sealing system, it solves the problems of rapid wear and easy leakage of existing valves under oil-coal slurry conditions.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A plunger-type angle regulating valve for an oil-coal slurry feed line includes a valve body with a horizontal inlet channel and a vertical outlet channel connected thereto, forming an angled flow path structure to reduce fluid impact and wear. An inlet bushing is installed on the inner wall of the inlet channel, and an outlet bushing is installed on the inner wall of the outlet channel; both are made of high-hardness, wear-resistant materials such as tungsten carbide or ceramic composite materials. A valve seat is fixed to the upper end of the outlet bushing, and the valve seat cooperates with the valve core to achieve a seal.

[0005] Furthermore, the valve body has a mounting hole at the top, into which an upper valve cover is installed. A guide sleeve and packing components are installed on the inner wall of the upper valve cover for guiding and sealing the valve stem. A bracket is connected to the upper end of the upper valve cover, and the bracket is fixed to the valve body by screws. A hydraulic actuator is located at the top of the bracket, which drives the valve core to move up and down through the valve stem connecting component and the valve stem, thereby opening and regulating the valve.

[0006] Furthermore, the valve core has a plunger-type structure, and its surface is hardened to improve wear resistance. The packing system includes components such as a packing gland, packing plate, and disc spring, which are tightened by studs and hexagonal nuts to ensure the dynamic sealing of the valve stem.

[0007] Furthermore, an inlet hole is provided on the side wall of the upper valve cover, which is horizontally connected to the inlet flow channel to reduce fluid turbulence. Both the inlet and outlet of the valve body are equipped with inlet and outlet gaskets, and the sealing performance is enhanced by inlet and outlet sealing gaskets.

[0008] Compared with the prior art, the beneficial effects of this utility model are: This invention reduces fluid impact and wear through the design of the angled flow channel; the plunger valve core is matched with the wear-resistant bushing to adapt to media with high particle content; the disc spring pre-tightened packing system ensures long-term sealing reliability; the modular structure facilitates quick replacement of valve internals. This invention is suitable for flow regulation of media containing solid particles such as oil-coal slurry, water-coal slurry, and petroleum coke slurry, and has the advantages of good wear resistance, reliable sealing, and convenient maintenance. Attached Figure Description

[0009] To more clearly illustrate the technical solution of this utility model, the drawings used in the implementation examples will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0010] Figure 1 This is a cross-sectional view of the overall structure of a plunger valve core angle type regulating valve for an oil-coal slurry feed line proposed in this utility model; Figure 2 This is a front view schematic diagram of the overall structure of a plunger valve core angle type regulating valve for an oil-coal slurry feed line proposed in this utility model; Figure 3 This is a schematic diagram of the overall structure of the valve body of a plunger valve core angle type regulating valve for an oil-coal slurry feed line proposed in this utility model. Figure 4 This is a three-dimensional structural diagram of the support structure for a plunger valve core angle regulating valve for an oil-coal slurry feed line proposed in this utility model.

[0011] In the picture: 1-Valve body; 2-Inlet bushing; 3-Screw; 4-Locking nut; 6-Cylindrical pin; 7-Valve core; 8-Double-ended stud; 9-Hex nut; 10-Packing disc spring washer; 11-Packing disc spring bushing; 12-Disc spring; 13-Packing pressure plate; 14-Packing gland; 15-Guide sleeve; 16-Packing component; 17-Sealing gasket; 18-Cylindrical locating pin; 19-Packing base gasket; 20-Upper valve cover; 21-Set screw; 22-Valve seat gasket; 23-Valve seat; 24-Outlet bushing; 25-Inlet / outlet sealing gasket; 26-Inlet / outlet gasket; 100-Bracket; 101-Inlet flow channel; 102-Outlet flow channel; 103-Valve stem; 104-Valve stem connecting component; 105-Hydraulic actuator. Detailed Implementation

[0012] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0013] Example 1: See Figure 1-4 A plunger valve core angle regulating valve for an oil-coal slurry feed line includes: a valve body 1, which has a horizontal inlet channel 101 and a vertical outlet channel 102 communicating with the inlet channel 101; an inlet bushing 2, fixed to the inner wall of the inlet channel 101; an outlet bushing 24, fixed to the inner wall of the outlet channel 102, and having a valve seat 23 at its upper end; an upper valve cover 20, installed in the mounting hole at the top of the valve body 1, communicating with the upper end of the outlet channel 102; and a bracket 1. 00, fixed to the upper end of the upper valve cover 20, and connected to the valve body 1 through the screw 3; guide sleeve 15, located on the inner wall of the upper end of the upper valve cover 20; packing gland 14, located on the upper end of the guide sleeve 15; packing pressure plate 13, connected to the bracket 100 through multiple double-headed studs 8, pressing the packing gland 14; valve core 7, located in the liquid outlet channel 102, and connected to the hydraulic actuator 105 at the top of the bracket 100 through the valve stem 103 and the valve stem connecting component 104.

[0014] The valve core 7 is sequentially installed inside the packing gland 14, guide sleeve 15, packing component 16, packing base gasket 19 and upper valve cover 20.

[0015] The upper valve cover 20 has an inlet hole on its side wall that communicates with the liquid inlet channel 101.

[0016] The valve body 1 is provided with inlet and outlet gaskets 26 at both the inlet and outlet, and inlet and outlet sealing gaskets 25 are provided between the inlet bushing 2 and the outlet bushing 24 and the inlet and outlet gaskets 26.

[0017] The upper valve cover 20 has a first stepped through hole on its inner wall, and a packing pad 19 and a packing component 16 are arranged sequentially from bottom to top inside the hole. The lower end of the guide sleeve 15 is embedded in the first stepped through hole and pressed against the packing component 16.

[0018] The lower end of the double-ended stud 8 is threaded to the bracket 100, and the upper end passes through the packing pressure plate 13, disc spring 12, packing disc spring bushing 11 and packing disc spring washer 10 in sequence and is pressed by the hexagonal nut 9.

[0019] The upper valve cover 20 has a second stepped through hole at its lower end, which is fitted onto the upper end of the valve seat 23 and limited by the flange-shaped boss at the upper end of the valve seat 23. The upper valve cover 20 and the valve seat 23 are fixed by set screws.

[0020] The lower end of the screw 3 is threaded to the top of the valve body 1, and the upper end passes through the bracket 100 and is fixed by the lock nut 4.

[0021] The bracket 100 is a cylindrical body with mounting through holes at the bottom and top. Its bottom is positioned and connected to the upper valve cover 20 by a cylindrical pin 6, and the side wall of the body is provided with an operating port.

[0022] In this embodiment, the valve body 1 is integrally forged from forged steel, and has a horizontal inlet channel 101 and a vertical outlet channel 102 inside, forming an angular structure to reduce fluid impact and eddies. The inner walls of the inlet channel 101 and the outlet channel 102 are press-fitted with an inlet bushing 2 and an outlet bushing 24, respectively. Both are made of tungsten carbide-based hard alloy material and are fixed by interference fit to improve wear resistance and corrosion resistance. Sealing grooves are machined on the inlet and outlet end faces of the valve body 1, and inlet / outlet gaskets 26 (made of flexible graphite stainless steel spiral wound gaskets) are installed. A sealed connection with the pipe flange joint is achieved through inlet / outlet sealing gaskets 25 (made of polytetrafluoroethylene).

[0023] For details, see Figure 1 The valve core 7 is a plunger structure with a tungsten carbide coating. Its lower end mates with the upper conical surface of the valve seat 23 to achieve a seal. The valve seat 23 is fixed to the upper end of the outlet bushing 24 and is prevented from rotating by a set screw. The upper end of the valve core 7 is threaded to the valve stem 103 and is secured with a pin. The valve stem 103 is made of 17-4PH stainless steel and has been nitrided to improve its wear resistance.

[0024] For details, see Figure 1 An inlet hole (with the same diameter as the inlet flow channel 101) is provided on the side wall of the upper valve cover 20 to reduce fluid disturbance. From bottom to top, a packing base gasket 19 (made of 304 stainless steel) and a packing component 16 (composed of multiple layers of flexible graphite braided packing rings) are installed in the first stepped through hole at the upper end of the upper valve cover 20. The lower end of the guide sleeve 15 is pressed into the first stepped through hole and tightens the packing component 16. The packing gland 14 is threaded to the upper end of the guide sleeve 15 and is tightened by the packing pressure plate 13 and the double-ended stud 8. A disc spring 12, a packing disc spring bushing 11, and a packing disc spring washer 10 are installed on the upper end of the double-ended stud 8. The preload is adjusted by the hexagonal nut 9 to ensure the reliability of the dynamic seal of the valve stem 103.

[0025] Specifically, the bracket 100 is a cylindrical body with a bottom through hole fitted onto the outer circumference of the upper valve cover 20 and positioned by a cylindrical pin 6. An operating port is provided on the side wall of the bracket 100 for easy maintenance of the packing structure. The lower end of the screw 3 is screwed into the threaded hole at the top of the valve body 1, and the upper end passes through the mounting hole of the bracket 100 and is locked by a lock nut 4. The hydraulic actuator 105 is a single-acting hydraulic cylinder, hinged to the upper end of the valve stem 103 via a valve stem connecting component 104 (using a universal joint structure), enabling smooth lifting and lowering of the valve core 7 and angle self-adaptation.

[0026] During assembly, first press the valve seat 23 into the outlet bushing 24, and then install the entire assembly into the outlet flow channel 102 of the valve body 1; next, fit the second stepped through hole at the lower end of the upper valve cover 20 onto the upper end of the valve seat 23, and secure it with a set screw; then install the packing base 19, packing component 16, guide sleeve 15, and packing gland 14 in sequence; finally, position the bracket 100 and the upper valve cover 20 with cylindrical pins 6, and secure them to the valve body 1 with screws 3 and lock nuts 4. During operation, the hydraulic actuator 105 drives the valve core 7 to rise and fall, and the flow channel opening and closing and flow regulation are achieved through the conical engagement between the plunger-type valve core 7 and the valve seat 23.

[0027] In this embodiment, the valve core 7 is a plunger-type valve core, and the valve core 7 and valve stem 103 are integrated, ensuring the valve's sealing performance and eliminating internal and external leakage. Simultaneously, the valve has a low opening torque, enabling rapid opening and closing, long service life, and effortless operation. The seal utilizes an upper seal (packing bottom gasket 19) and packing; tightening the packing gland 14 achieves a seal on the valve stem 103. The lower end of the valve core 7 is designed with a spherical surface, which mates with the chamfer on the upper part of the valve seat 23, allowing for effective adjustment of the valve flow rate even at small openings. The valve core 7 is made of wear-resistant, corrosion-resistant, and erosion-resistant materials such as nickel-based alloys. Cobalt-based alloys are welded onto the contact surfaces between the valve core 7 and the valve seat 23 to increase hardness, making the valve core 7 more wear-resistant, corrosion-resistant, and erosion-resistant, thus extending its service life. Except for the upper connecting end, the outer surface of the valve stem 103 (extending into the valve body and the spherical surface) is coated with a tungsten carbide or similar coating to form a protective film, making the valve core 7 more wear-resistant, corrosion-resistant, and erosion-resistant, further extending its service life. After grinding, the hardened parts are plated with a thin film of diamond-like carbon or similar materials, forming another protective film, making the valve core 7 even more wear-resistant, corrosion-resistant, and erosion-resistant, further extending its service life. This multi-layered hardening and protection significantly improves the performance and greatly extends the lifespan of the valve core 7.

[0028] In this embodiment, specifically, a guide sleeve 15 is designed at the junction of the bracket 100 and the upper valve cover 20. This ensures that the valve stem 103 moves coaxially in this section, and the upper guide makes the valve core 7 tilt less, resulting in higher reliability.

[0029] In this embodiment, specifically, both the valve seat 23 and the inlet / outlet bushing 2 are made of special materials such as hard alloy, which are wear-resistant, erosion-resistant, and corrosion-resistant. The use of hard alloy gives the valve seat 23 and inlet / outlet bushing 2 excellent properties such as high hardness, wear resistance, good strength and toughness, heat resistance, and corrosion resistance. The special properties of the material effectively resist strong erosion, corrosion, and wear from the medium, extending the service life of the parts. The valve seat 23, inlet / outlet bushing 2, and other hard alloy parts are designed with multiple mating points with other metal parts to minimize damage to the hard alloy parts from vibration during use.

[0030] In this embodiment, the upper valve cover 20 is integrated with the sleeve, which reduces the valve volume, simplifies the process and assembly flow, and improves production efficiency. The lower part (the section in contact with the medium) of the upper valve cover 20 is overlaid with a cobalt-based alloy using Stellite welding to increase hardness, making the valve core 7 more wear-resistant, corrosion-resistant, and erosion-resistant, thus extending its service life. In this embodiment, a gasket and sealing gasket structure is designed at the valve inlet and outlet, which is used in conjunction with the valve body 1 and the mating flange. The gasket can guide and position the mating flange and support the inlet and outlet bushing 2. The sealing gasket can compensate for the gap between the inlet and outlet bushing 2 and the gasket, ensure sealing performance, prevent internal leakage, and at the same time, it can also buffer the inlet and outlet bushing 2 and the gasket to achieve a soft landing, avoid hard pressure damage to the hard bushing, and minimize the damage to the hard bushing caused by vibration during use.

[0031] In this embodiment, the lower part of the upper valve cover 20 and the upper part of the valve seat 23 are designed with a tenon and mortise structure for positioning and fitting. The upper valve cover 20 and the valve seat 23 are connected by set screws, so that the upper valve cover 20 and the valve seat 23 can be hoisted as a whole. This makes the fit between the upper valve cover 20 and the valve seat 23 more secure and prevents damage to the rigid bushing from vibration during use.

[0032] In this embodiment, the upper valve cover 20 bolts are fastened with anti-loosening washers to ensure the reliability of the fastener connection under high temperature and high pressure, and to ensure safety.

[0033] In this embodiment, the valve body 1 has a threaded hole on its side, which can be used to connect to the field platform with fasteners to ensure the stability of the valve under high-pressure operation and avoid valve resonance caused by pipeline vibration.

[0034] In this embodiment, multiple positioning pins are designed to prevent internal parts from rotating due to unilateral scouring by the medium, thereby avoiding packing failure caused by part rotation and preventing leakage at the packing, ensuring safety. The positioning pins also prevent potential problems.

[0035] In this embodiment, the packing gland 14 is designed with a guide strip and a dustproof ring. The guide strip is used to guide the valve cover and prevent the valve stem 103 from tilting and contacting the packing gland 14, thus preventing the valve stem 103 from being scratched.

[0036] In this embodiment, the dust seal's function is to prevent the ingress of dust, dirt, sand, and metal shavings. Its special design prevents scratches, protects guide components, and extends the service life of the seal. An interference-fit outer diameter ensures the dust seal fits tightly into the groove, preventing the intrusion of impurities and moisture. The dust seal tightly seals the cylinder, eliminating the need for screws and brackets. Unlike metal-framed dust seals, it does not corrode due to the absence of metal inserts. Furthermore, the groove does not require very strict tolerances.

[0037] In this embodiment, the disc spring packing itself lacks elasticity. If it is only compacted by screws, the packing will loosen over time, easily leading to leakage at the valve stem 103. However, by adding the disc spring 12 (disc spring), it can provide sustained pressure, prevent leakage, and reduce maintenance costs. The disc spring 12 bears static or dynamic loads acting axially at its upper inner edge and lower outer edge. After being compressed, it deforms until it is flattened, storing energy as a live load. When necessary, it automatically converts into the additional compressive load required for sealing, reducing the continuous tightening requirement of the packing during use and minimizing unnecessary downtime and leakage losses. After deforming under load, the disc spring 12 stores a certain amount of potential energy. When the bolts loosen, the disc spring 12 releases some potential energy to maintain the pressure between the flange connections to meet the sealing requirements. The stress distribution of the disc spring 12 decreases uniformly from the inside to the outside, achieving a low-stroke, high-compensation-force effect.

[0038] See this embodiment. Figure 1 , 2 4. A flange-shaped support bushing is provided on the top of the bracket 100. The sleeve of the flange-shaped support bushing is coaxially embedded in the mounting through hole. The flange end face of the flange-shaped support bushing is fixedly connected to the top plate of the bracket 100. The bracket 100 is fixedly connected to the hydraulic actuator 105. The telescopic end of the hydraulic actuator 105 passes through the mounting through hole on the top of the bracket 100, and the support bushing extends into the bracket 100. The support bushing is used for the installation and positioning of the hydraulic actuator, preventing misalignment when the push rod of the hydraulic actuator 105 is connected to the valve stem 103, ensuring coaxiality, avoiding tilting of the valve stem 103, and preventing leakage.

[0039] The valve in this embodiment is used under the following conditions: medium: mixed hydrogen-oil-coal slurry (containing 45% solids); temperature: design temperature 360℃, inlet temperature 240℃; pressure: design pressure 22.2MPa, maximum inlet pressure 19.6MPa.g, closing pressure differential 22.2MPa; the overall structure is simple and compact, saving installation space. It has wear-resistant, corrosion-resistant, and erosion-resistant properties.

[0040] Other embodiments of the present invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. The present invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope of the invention is indicated by the claims.

[0041] It should be understood that this utility model is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model.

Claims

1. An oil coal slurry feed line plug valve trim angle type regulating valve characterized by, include: The valve body (1) has a horizontal inlet channel (101) and a vertical outlet channel (102) connected to the inlet channel (101). The inlet bushing (2) is fixed to the inner wall of the liquid inlet channel (101); The outlet bushing (24) is fixed to the inner wall of the liquid outlet channel (102) and has a valve seat (23) at the upper end. The upper valve cover (20) is installed in the mounting hole at the top of the valve body (1) and is connected to the upper end of the liquid outlet channel (102); The bracket (100) is fixed to the upper end of the upper valve cover (20) and connected to the valve body (1) by a screw (3); Guide sleeve (15) is provided on the inner wall of the upper end of the upper valve cover (20); A packing gland (14) is located at the upper end of the guide sleeve (15); The packing pressure plate (13) is connected to the bracket (100) by multiple double-headed studs (8) to press the packing gland (14). The valve core (7) is located in the liquid outlet channel (102) and is connected to the hydraulic actuator (105) at the top of the bracket (100) via the valve stem (103) and the valve stem connecting component (104).

2. The plunger valve core angle type regulating valve for oil-coal slurry feed line according to claim 1, characterized in that, The valve core (7) is sequentially inserted into the packing gland (14), guide sleeve (15), packing component (16), packing base (19) and upper valve cover (20).

3. The plunger valve core angle type regulating valve for an oil-coal slurry feed line according to claim 1, characterized in that, The upper valve cover (20) has an inlet hole on its side wall that communicates with the inlet channel (101).

4. The plunger valve core angle type regulating valve for an oil-coal slurry feed line according to claim 1, characterized in that, The valve body (1) is provided with inlet and outlet gaskets (26) at both the inlet and outlet, and inlet and outlet sealing gaskets (25) are provided between the inlet bushing (2) and the outlet bushing (24) and the inlet and outlet gaskets (26).

5. The plunger valve core angle type regulating valve for an oil-coal slurry feed line according to claim 1, characterized in that, The upper valve cover (20) has a first stepped through hole on its inner wall, and a packing pad (19) and a packing component (16) are arranged in sequence from bottom to top inside the hole. The lower end of the guide sleeve (15) is embedded in the first stepped through hole and pressed against the packing component (16).

6. The plunger valve core angle type regulating valve for an oil-coal slurry feed line according to claim 1, characterized in that, The lower end of the double-headed stud (8) is threaded to the bracket (100), and the upper end passes through the packing pressure plate (13), disc spring (12), packing disc spring bushing (11) and packing disc spring washer (10) in sequence and is pressed by the hexagonal nut (9).

7. The plunger valve core angle type regulating valve for an oil-coal slurry feed line according to claim 1, characterized in that, The lower end of the upper valve cover (20) is provided with a second stepped through hole, which is sleeved on the upper end of the valve seat (23) and limited by the flange-shaped boss at the upper end of the valve seat (23). The upper valve cover (20) and the valve seat (23) are fixed by set screws.

8. The plunger valve core angle type regulating valve for oil-coal slurry feed line according to claim 1, characterized in that, The lower end of the screw (3) is threaded to the top of the valve body (1), and the upper end passes through the bracket (100) and is fixed by the lock nut (4).

9. A plunger valve core angle type regulating valve for an oil-coal slurry feed line according to claim 1, characterized in that, The bracket (100) is a cylindrical body with mounting through holes at the bottom and top. Its bottom is positioned and connected to the upper valve cover (20) by a cylindrical pin (6), and the side wall of the cylinder is provided with an operating port.

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