Grooved valve guide rod of one-way valve and right-angle one-way valve of material delivery plunger pump

Abstract

The invention is a straight angle type one-way valve of a one-way valve with a slotted valve guide rod and a material delivery plunger pump, and the main point of the innovation scheme is that the existing round rod type guide rod is improved into a slotted guide rod, that is, a guide rod with four axial material discharge grooves, which comprises a threaded section, a sealing section and a guide section, and four axial planes are mainly processed in the guide section, and the four axial planes form four material discharge grooves with the inner circle of the inner wear-resistant sliding sleeve; the material particles entering the sliding gap between the guide rod and the inner wear-resistant sliding sleeve can be smoothly discharged through the four material discharge grooves; at the same time, the material discharge grooves reduce the contact surface between the guide rod and the inner wear-resistant sliding sleeve, reduce the friction resistance therebetween, make the one-way valve switch more flexible, and achieve two goals at once. The one-way valve of the plunger pump uses the valve guide rod, solves the technical problem that the material particles entering the sliding gap between the guide rod and the inner wear-resistant sliding sleeve of the valve are difficult to be completely discharged after a long time, which leads to the increase of the friction resistance therebetween, the valve jamming and the gradual failure of the one-way valve switch, and prolongs the service life of the sliding sleeve.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of the feed plunger pump of filter press unit, and relates to a straight angle type one-way valve of the feed plunger pump. BACKGROUND

[0002] The filter press is a kind of pressurized filtration equipment with multiple filter chambers and intermittent operation; the filter press unit comprises a filter press, a flocculation mixer, a feed plunger pump, an air compressor and a filter cake conveyor; and is suitable for pressurized solid-liquid separation of various suspended liquid materials (i.e. mixture of liquid and solid particles).

[0003] The feed plunger pump mainly comprises a plunger, a spring, a cylinder and two plunger pump one-way valves, and is matched with a hydraulic station for work; the plunger and the cylinder hole form a sealed volume; the plunger pump realizes material suction and feeding by reciprocating movement of the plunger in the cylinder driven by hydraulic pressure, so that the volume of the sealed working cavity changes; the plunger moves downward to suck material from the flocculation mixer, and moves upward to discharge material (feed) to the filter press.

[0004] The plunger pump one-way valve mainly comprises a valve cylinder, a valve cover, a valve spring, an inner wear-resistant sliding sleeve, a valve guide rod, a valve, a sealing ring, a sliding sleeve outer pipe, a material inlet end and a material outlet end; the sliding sleeve outer pipe is vertically installed at the center of the valve, and the inner wear-resistant sliding sleeve is installed in the sliding sleeve outer pipe to form a valve assembly; the valve guide rod is inserted into the inner wear-resistant sliding sleeve of the valve assembly to form a one-way valve core; the valve guide rod is a round rod type guide rod, and the valve guide rod and the inner wear-resistant sliding sleeve are in sliding gap cooperation, and can slide upward and downward relative to each other; the one-way valve core is installed at the material inlet end in the valve cylinder, the valve spring is installed on the sliding sleeve outer pipe, the upper end of the valve guide rod is fixed in the valve rod fixing hole of the valve cover to form a one-way valve, and the one-way valve is normally closed under the action of the valve spring; the double one-way valves are respectively installed on the material suction port and the material outlet port of the feed plunger pump, and are used for one-way automatic passage of pressurized material and prevention of material backflow.

[0005] The existing plunger pump one-way valve has the following defects: the valve guide rod and the inner wear-resistant sliding sleeve are in sliding gap cooperation, and material particles enter the sliding gap between the valve guide rod and the inner wear-resistant sliding sleeve over time, which is difficult to be completely discharged, resulting in increased friction resistance between the two, valve jamming, and gradual failure of the one-way valve switch, which affects the normal work of the plunger pump; the material valve jamming is a technical problem that people have been eager to solve but have failed to solve. SUMMARY

[0006] The purpose of the present application is to overcome the defects of the existing plunger pump check valve, solve the technical problem that material particles enter the sliding gap between the valve guide rod and the inner wear-resistant sliding sleeve, are difficult to be completely discharged, cause the friction resistance between the two to increase, cause the check valve to be stuck, and gradually cause the check valve to fail, and provide a slotted valve guide rod of a check valve and a right-angle check valve of a material feeding plunger pump.

[0007] The innovative technical solution adopted by the present application to solve the technical problems of the prior art is: a slotted valve guide rod of a check valve (hereinafter referred to as a valve guide rod), the key points of the overall technical solution are that, compared with the prior art, the overall structure of the innovation has the outstanding substantial features that: the existing round rod type valve guide rod is improved into a slotted valve guide rod of a check valve, i.e., a valve guide rod with four axial material discharge grooves, which includes a valve rod threaded section, a valve rod sealing section, and a valve rod guide section, four axial planes are machined on the surface of the valve rod guide section, and the four axial planes form four axial material discharge grooves with the inner circle of the inner wear-resistant sliding sleeve; material particles entering the sliding gap between the valve guide rod and the inner wear-resistant sliding sleeve can be smoothly discharged through the four valve rod material discharge grooves; at the same time, the valve rod material discharge grooves reduce the contact surface between the valve guide rod and the inner wear-resistant sliding sleeve, effectively reduce the friction resistance between the two, make the check valve switch more flexible, and achieve two goals at once; thereby, the technical problem that material particles enter the sliding gap between the valve guide rod and the inner wear-resistant sliding sleeve over time, are difficult to be completely discharged, cause the friction resistance between the two to increase, cause the check valve to be stuck, and gradually cause the check valve to fail is solved.

[0008] The specific design scheme of the present application is: (1) the valve rod threaded section has an outer thread fixedly installed with the slotted guide rod; (2) the valve rod sealing section has a valve rod sealing groove matched with an O-shaped sealing ring; (3) the valve rod guide section has four axial material discharge grooves, i.e., four axial planes are machined on the surface of the valve rod guide section using a milling machine (machining is convenient), the four axial planes form four axial material discharge grooves with the inner circle of the inner wear-resistant sliding sleeve, and a part of the circular arc surface between adjacent material discharge grooves is matched with the sliding gap of the inner circle of the inner wear-resistant sliding sleeve, i.e., the valve rod guide section has four circular arc surfaces separated by the four axial material discharge grooves; the valve rod threaded section, the valve rod sealing section, and the valve rod guide section are machined on the same round steel.

[0009] The connection relationship of the present application is: for the convenience of description, the valve assembly closely related to the valve guide rod and the inner wear-resistant sliding sleeve, valve cover and sealing ring thereof are additionally provided; the sealing ring is installed in the valve rod sealing groove, the upper end of the valve guide rod is vertically fixedly installed in the valve rod fixing hole in the center of the valve cover, the inner wear-resistant sliding sleeve of the valve assembly is sleeved on the valve rod guide section of the valve guide rod, and the valve assembly can slide up and down along the valve guide rod; the four arc surfaces of the valve rod guide section are in sliding gap cooperation with the inner wear-resistant sliding sleeve, and the material particles in the sliding gap between the valve guide rod and the inner wear-resistant sliding sleeve can be smoothly discharged through the four valve rod discharge grooves.

[0010] The present application also provides a right-angle type one-way valve (referred to as: plunger pump one-way valve) of a material conveying plunger pump, that is, a right-angle type anti-jamming one-way valve of a material conveying plunger pump matched with a filter press, using the slotted valve guide rod of the one-way valve provided by the present application; the plunger pump one-way valve is mainly composed of a valve cylinder, a valve cover, a valve pressing spring, an inner wear-resistant sliding sleeve, a valve guide rod, a valve, an O-shaped sealing ring, a sliding sleeve outer pipe, a feeding pipe flange and a discharging pipe flange; the two one-way valves are respectively installed on the material suction port and the material conveying port of the material conveying plunger pump, and the valve is normally closed under the action of the valve pressing spring, and the valve is automatically opened when pumping, allowing the pressurized material to automatically pass through in one direction and preventing the material from flowing back.

[0011] The slotted valve guide rod of the one-way valve and the right-angle type one-way valve of the material conveying plunger pump provided by the present application have the advantages of simple structure, convenient discharge groove processing, small valve sliding contact surface, small sliding friction resistance, easy discharge of sliding gap, no jamming phenomenon, more flexible valve opening and closing, long service life and reliable performance; the beneficial effects are that the four axial discharge grooves arranged on the surface of the valve guide rod can smoothly discharge the material particles in the sliding gap between the valve guide rod and the inner wear-resistant sliding sleeve, effectively preventing the material from jamming the valve; at the same time, the valve rod discharge grooves reduce the valve sliding contact surface, effectively reduce the friction resistance of the valve sliding, make the one-way valve opening and closing more flexible, prolong the service life of the inner wear-resistant sliding sleeve, and achieve two goals at once; solve the technical problem of material jamming the valve that people have been eager to solve but have failed to achieve success. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a perspective view of the slotted valve guide rod of the one-way valve.

[0013] Figure 2 It is a schematic view of the slotted valve guide rod of the one-way valve.

[0014] Figure 3 It is a schematic view of the right-angle type one-way valve of the material conveying plunger pump.

[0015] Figure 4 It is a schematic view of the one-way valve body of the right-angle type one-way valve of the material conveying plunger pump.

[0016] Figure 5 Figure 1 is a schematic diagram of the valve and the outer pipe of the straight angle type one-way valve of the material conveying plunger pump of the present application.

[0017] Figure 6 Figure 1 is a schematic diagram of the valve and the outer pipe of the straight angle type one-way valve of the material conveying plunger pump of the present application.

[0018] Reference signs: 1 - valve rod threaded section, 2 - valve rod sealing section, 3 - valve rod guide section, 4 - valve rod sealing groove, 5 - valve rod discharge groove, 6 - valve cylinder, 7 - valve cover, 8 - valve compression spring, 9 - inner wear-resistant sliding sleeve, 10 - one-way valve slotted valve guide rod (referred to as valve guide rod or the present application), 11 - valve, 12 - O-shaped sealing ring, 13 - breathing hole, 14 - sliding sleeve outer pipe, 15 - feed pipe flange, 16 - discharge pipe flange, 18 - one-way valve body, 20 - valve rod fixing hole. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be described below in combination with the drawings of the one-way valve slotted valve guide rod and the straight angle type one-way valve of the material conveying plunger pump in the embodiments of the present application. The described embodiments are only a part of the preferred embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments made by those skilled in the art without creativity, such as valve sliding gap discharge methods and valve guide rods with similar structures, all belong to the protection scope of the present application.

[0020] Embodiment 1

[0021] A one-way valve slotted valve guide rod 10 (referred to as valve guide rod) is innovative in overall implementation scheme. The key points are as follows: the existing round rod type valve guide rod is improved into a one-way valve slotted valve guide rod 10, i.e. a valve guide rod 10 with four axial valve rod discharge grooves 5, which includes a valve rod threaded section 1, a valve rod sealing section 2, and a valve rod guide section 3. Four axial planes are processed on the surface of the valve rod guide section 3, and the four axial planes and the inner circle of the inner wear-resistant sliding sleeve 9 form four axial valve rod discharge grooves 5. The material particles entering the sliding gap between the valve guide rod 10 and the inner wear-resistant sliding sleeve 9 can be smoothly discharged through the four valve rod discharge grooves 5. At the same time, the valve rod discharge grooves 5 reduce the contact surface between the valve guide rod 10 and the inner wear-resistant sliding sleeve 9, effectively reducing the frictional resistance therebetween, making the opening and closing of the plunger pump one-way valve more flexible, and achieving two goals at once. The specific implementation scheme is described in detail as follows.

[0022] The valve rod threaded section 1, the valve rod sealing section 2, and the valve rod guide section 3 of the valve guide rod 10 are processed on the same round steel; they are used to form a one-way valve core with a valve assembly and serve as a guide rod for the upward and downward sliding of the valve assembly (opening and closing of the one-way valve).

[0023] The valve stem threaded section 1, that is, the threaded section of the upper part of the valve guide rod 10, has external threads for fixing the valve guide rod 10; the valve stem threaded section 1 is vertically fixed and installed in the valve stem fixing hole 20 in the center of the valve cover 7, for fixing the valve guide rod 10 on the valve cover 7 and in the valve cylinder 6.

[0024] The valve stem sealing section 2, that is, the sealing section of the upper part of the valve guide rod 10, has a valve stem sealing groove 4 matched with the O-shaped sealing ring 12; the O-shaped sealing ring 12 is installed in the valve stem sealing groove 4, for preventing material from leaking from the upper end of the valve guide rod 10.

[0025] The valve stem guide section 3, that is, the guide section of the lower part of the valve guide rod 10, has four axial valve stem discharge grooves 5, that is, four axial planes are processed on the surface of the valve stem guide section 3 by using a milling machine, the four axial planes form four axial valve stem discharge grooves 5 with the inner circle of the inner wear-resistant sliding sleeve 9, and a part between adjacent valve stem discharge grooves 5 is a circular arc surface matched with the sliding clearance of the inner circle of the inner wear-resistant sliding sleeve 9, that is, the valve stem guide section 3 has four circular arc surfaces separated by the four axial discharge grooves 5; the inner wear-resistant sliding sleeve 9 of the valve assembly is sleeved on the valve stem guide section 3 of the valve guide rod 10, and the valve assembly can slide up and down along the valve guide rod 10; the four circular arc surfaces of the valve stem guide section 3 are matched with the sliding clearance of the inner wear-resistant sliding sleeve 9, and the material particles in the sliding clearance between the valve guide rod 10 and the inner wear-resistant sliding sleeve 9 can be smoothly discharged through the four valve stem discharge grooves 5; the valve stem guide section 3 serves as a guide rod for the up-and-down sliding (opening and closing) of the valve assembly, and prevents material from being stuck in the valve.

[0026] The valve guide rod 10 with grooves of the one-way valve provided by the application has the advantages of simple structure, convenient discharge groove processing, small valve sliding contact surface, small sliding friction resistance, easy discharge of the sliding clearance, no valve sticking phenomenon, more flexible opening and closing of the valve, long service life, and reliable performance; the technical problem that material particles enter the sliding clearance between the valve guide rod 5 and the inner wear-resistant sliding sleeve 9 over time, are difficult to be completely discharged, cause the friction resistance between the two to increase and the valve to be stuck, and gradually cause the one-way valve 18 to fail to open and close is solved; at the same time, the valve stem discharge grooves 5 reduce the valve sliding contact surface, effectively reduce the friction resistance of the valve sliding, make the one-way valve 18 more flexible to open and close, and prolong the service life of the inner wear-resistant sliding sleeve 9, achieving two goals at once and increasing efficiency.

[0027] Example 2

[0028] The application discloses a right-angle type one-way valve of a feeding plunger pump, namely, a right-angle type anti-blocking one-way valve of a feeding plunger pump matched with a filter press, and provides a valve guide rod 10 (referred to as a valve guide rod) of the one-way valve; the plunger pump one-way valve is mainly composed of a valve cylinder 6, a valve cover 7, a valve pressing spring 8, an inner wear-resistant sliding sleeve 9, the valve guide rod 10, a valve 11, an O-shaped sealing ring 12, a sliding sleeve outer pipe 14, a feeding pipe flange 15 and a discharging pipe flange 16; the valve cylinder 6 is provided with a feeding port and a discharging port at the lower surface and the side surface; the valve cover 7 is provided with a valve rod fixing hole 20 at the center; the inner wear-resistant sliding sleeve 9 is a nylon inner wear-resistant sliding sleeve 9; the valve 11 is provided with a sealing arrangement at the lower surface; and the sliding sleeve outer pipe 14 is provided with a breathing hole 13 at the lower end. The application has the same technical part as the prior art, and is manufactured according to the relevant industry standards of the plunger pump one-way valve in China.

[0029] Assembly of the plunger pump one-way valve: (1) assembly of the one-way valve core: the sliding sleeve outer pipe 14 is vertically installed at the center of the valve 11, the inner wear-resistant sliding sleeve 9 is installed in the sliding sleeve outer pipe 14, thereby forming a valve assembly; the valve guide rod 10 is inserted into the inner wear-resistant sliding sleeve 9 of the valve assembly, thereby forming the one-way valve core; the valve guide rod 10 and the inner wear-resistant sliding sleeve 9 are in sliding clearance fit, and can slide up and down relative to each other; (2) assembly of the one-way valve: the feeding pipe flange 15 and the discharging pipe flange 16 are respectively welded on the feeding port and the discharging port of the valve cylinder 6; the one-way valve core is installed at the feeding end in the valve cylinder 6; the valve pressing spring 8 is installed on the sliding sleeve outer pipe 14; the upper end of the valve guide rod 10 is fixed in the valve rod fixing hole 20 of the valve cover 7, thereby forming the plunger pump one-way valve; and the plunger pump one-way valve is normally closed under the action of the valve pressing spring 8.

[0030] Final assembly of the plunger pump one-way valve: the double one-way valves are respectively installed on the feeding port and the discharging port of the feeding plunger pump; when the feeding plunger pump is used for pumping the filter press, the valve is automatically opened, the pressurized material is automatically passed in one way, and the material backflow is prevented. The material particles entering the sliding clearance between the valve guide rod 10 and the inner wear-resistant sliding sleeve 9 can be smoothly discharged through the four valve rod discharge grooves 5.

[0031] The right-angle type one-way valve of the feeding plunger pump has the beneficial effects that the four axial valve rod discharge grooves 5 are arranged on the surface of the valve guide rod 10, so that the material particles entering the sliding clearance between the valve guide rod 10 and the inner wear-resistant sliding sleeve 9 can be smoothly discharged, and the material blocking of the valve is effectively prevented; meanwhile, the valve rod discharge grooves 5 reduce the sliding contact surface of the valve, effectively reduce the friction resistance of the valve sliding, make the one-way valve 18 more flexible, prolong the service life of the inner wear-resistant sliding sleeve 9, and achieve two effects at a time; and the technical problem of the material blocking of the valve, which people have been eager to solve but have failed to solve, is solved, and the efficiency is improved.

Claims

1. A right-angle check valve for a feed plunger pump, which is used in conjunction with a filter press unit and comprises a valve barrel, a valve cover, a pressure valve spring, an inner wear-resistant sleeve, a slotted valve guide rod for the check valve, a valve, an O-ring, an outer sleeve tube, a feed pipe flange, and a discharge pipe flange; characterized by: The grooved valve guide rod of the one-way valve includes a valve stem threaded section, a valve stem sealing section, and a valve stem guide section. The valve stem threaded section has an external thread for fixing the grooved guide rod; the valve stem sealing section has a valve stem sealing groove that cooperates with the O-ring; the valve stem guide section has four axial discharge grooves, that is, four axial planes are machined on the surface of the valve stem guide section using a milling machine, and the four axial planes and the inner circle of the inner wear-resistant sliding sleeve form four axial discharge grooves, and a part of the arc surface that cooperates with the sliding clearance of the inner circle of the inner wear-resistant sliding sleeve is retained between adjacent discharge grooves, that is, four arc surfaces separated by four axial discharge grooves; the valve stem threaded section, the valve stem sealing section and the valve stem guide The three sections are processed on the same round steel; the sealing ring is installed in the valve stem sealing groove, the upper end of the valve guide rod is vertically fixed in the valve stem fixing hole in the center of the valve cover, the inner wear-resistant sleeve of the valve assembly is sleeved on the valve stem guide section of the valve guide rod, and the valve assembly can slide up and down along the valve guide rod; the four arc surfaces of the valve stem guide section match the sliding gap of the inner wear-resistant sleeve, and the material particles entering the sliding gap between the valve guide rod and the inner wear-resistant sleeve can be discharged smoothly through the four valve stem discharge grooves; the valve cylinder has a feed port and a discharge port on the bottom and side respectively, a valve stem fixing hole in the center of the valve cover, a sealing setting under the valve, and a breathing hole at the lower end of the outer tube of the sleeve.

2. A right-angle one-way valve for a feeding plunger pump according to claim 1, wherein the outer tube of the sliding sleeve is vertically installed in the center of the valve, and the inner wear-resistant sliding sleeve is installed in the outer tube of the sliding sleeve to form a valve assembly; the valve guide rod is inserted into the inner wear-resistant sliding sleeve of the valve assembly to form a one-way valve core; the valve guide rod and the inner wear-resistant sliding sleeve have a sliding clearance, and the two can slide up and down relative to each other; the feed pipe flange and the discharge pipe flange are respectively welded to the feed port and the discharge port of the valve cylinder, the one-way valve core is installed on the feed end in the valve cylinder, the pressure valve spring is installed on the outer tube of the sliding sleeve, and the upper end of the valve guide rod is fixed in the valve stem fixing hole of the valve cover to form a right-angle one-way valve of the feeding plunger pump, and the right-angle one-way valve of the feeding plunger pump is normally closed under the action of the pressure valve spring.

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