CN2157329Y

CN2157329Y - Liquid inlet and outlet valves for reciprocating plunger mud pump

Info

Publication number: CN2157329Y
Application number: CN 92211904
Authority: CN
Inventors: 张家坤
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-05-28
Filing date: 1992-05-28
Publication date: 1994-02-23
Anticipated expiration: 2002-05-28

Abstract

The utility model provides liquid inlet and outlet valves for reciprocating a plunger mud pump, which is composed of a valve cover, an upper guide cover, a valve box, a press spring, a valve core, a valve seat, etc. The liquid inlet and outlet valves for reciprocating the plunger mud pump is characterized in that a lower guide frame is a blade type structure, which causes the structure and the work process of liquid inlet and outlet valves of the mud pump more reasonable, and as a result, the service life of the valve core can be prolonged. The liquid inlet and outlet valves for reciprocating the plunger mud pump matching with the plunger pump can be used for electric power, ore mine, metallurgy departments, etc. conveying slurry, such as, mortar, ore slurry, the mud, coal slurry, etc. containing large amounts of solid particles.

Description

Liquid inlet and outlet valves for reciprocating plunger mud pump

The utility model belongs to field of engineering technology, is a kind of accessory of reciprocating type mud pump with plunger.

At present, the reciprocating type mud pump with plunger combination valve in being extensive use of, the following leading truck of its spool is straight wall guide grab formula structure, is generally three-jaw wall or four paws wall guiding.When valve was in running order, mobile slurries washed away the one-sided formation of valve rod all the time, and therefore caused the one-sided serious wear of valve rod and off-centre, had influenced the proper functioning concentricity of spool.Simultaneously, it is bigger that the spool of this structure returns an impact force, very easily causes gland to shake and split, the problem that valve insert injures by a crashing object and locking nut is loosening, the working life of having reduced spool.

The purpose of this utility model, being to provide a kind of leading truck down is the combination valve of leaf structure, makes the structure of valve and working procedure more reasonable, thereby has improved effectively the working life of valve.

The utility model be achieved in that combination valve by valve gap, go up guide cover, clack box, pressing spring, spool, valve seat etc. and form, spool is by valve rod, locking nut, gland, valve insert, valve disc, leading truck is formed down.Here, the guide grab of following leading truck has been made leaf structure, not only played the leading role of spool in the process of rising and falling, and, can also make spool produce rotation at the volley, thereby avoid the uniform one-sided wearing and tearing of valve rod, valve rod is is along the circumferential direction worn and torn evenly, and improve steering capability, increase the service life.Simultaneously, spool is in the falling process, and the leading truck blade can also play damping function, has alleviated an impact force of returning of spool, thereby has effectively prolonged the working life of spool.

Below in conjunction with accompanying drawing the utility model is further described.

Fig. 1 is a working procedure schematic diagram of the present utility model.

Fig. 2 is a kind of concrete structure erection drawing of the present utility model.

As shown in Figure 1, motor is reciprocating by connecting rod drive plunger b.As plunger b during to left movement, it is big that the volume of its rightward space constantly becomes, and produces parital vacuum, and slurries are inhaled into valve body e through feed liquor valve d, and at this moment, liquid discharging valve a is closed condition.When plunger b moved right, the volume of its rightward space constantly diminished, and the pressure of slurries raises in the valve body e, and liquid discharging valve a opens, and discharges slurries, and at this moment, feed liquor valve d is closed condition.So, plunger b to-and-fro motion, combination valve ceaselessly rises and falls after rise, slurries continuously are inhaled into and discharge.

As shown in Figure 2, combination valve is made up of 2. clack box 3. pressing springs, 4. valve seats 11 of guide cover on the valve gap 1. and spool, and wherein spool is made up of 9. times leading trucks 10 of valve rod 5. locking nuts, 6. gland 7. valve inserts, 8. valve discs.Here, following leading truck 10 is a leaf structure.The outer rim of blade matches with the endoporus of valve seat 11; Valve rod 5 matches with the guiding endoporus of last guide cover 2, and guide function was good when spool was risen and fallen.In order to improve the flowing state of the slurries that enter blade, valve rod 5 lower ends are designed to the fluid director of taper arc surface structure.

If Figure 2 shows that the feed liquor valve, then its working procedure can followingly be explained: when journey is inhaled at the plunger place, form parital vacuum in the clack box 3, make on the spool and move, slurries suck clack box 3 spaces.When plunger place stroke, spool acts on seat next time at pressing spring 2, and clack box 3 internal pressures raise, and slurries are discharged.Liquid discharging valve is identical with the feed liquor valve arrangement, and working procedure is opposite, and two valves continuously open and close, and slurries are outwards carried continuously.Because leading truck 10 is a leaf structure under of the present utility model, so when spool continuously rose and fell, blade and slurries promoted mutually, has produced rotating force on spool, spool is is not only risen and fallen up and down, but also rotate around the axle center.Simultaneously, when spool returned, blade produced damping function, made the dropping process of spool obtain buffering, had reduced the rigid impact of spool and valve seat 11.After spool returned seat, the damping function of blade disappeared, and the active force of pressing spring 2 still can guarantee the excellent sealing of spool and valve seat.Like this, the one-sided serious problems of washing away of valve rod have just effectively been prevented, and have shaken and split that valve insert 8 injures the generation with problems such as locking nut 6 are loosening by a crashing object because of spool returns the excessive gland that causes 7 of an impact force.

This utility model and existing structure relatively almost can not increase parts and cost, so, both can prolong service life of valve, again simple and easy to do. This valve and plunger displacement pump are supporting, can be widely used in the industries such as electric power, mine, metallurgy and carry mortar, ore pulp, mud, coal slurry etc. to contain the slurries of a large amount of solid particles.

Description of drawings: a tapping valve b plunger c sealing d liquid feed valve e valve body

10 times leading truck 11 valve seats of guide cover 3 clack boxes 4 pressing springs, 5 valve rods, 6 locking nuts, 7 glands, 8 valve inserts, 9 valve discs on 1 valve gap 2

Claims

1, a kind of combination valve of reciprocating type mud pump with plunger, it is made up of valve gap, last guide cover, clack box, pressing spring, spool, valve seat etc., and the following leading truck that it is characterized in that spool is a leaf structure.

2, require 1 combination valve that proposes according to power, the lower end that it is characterized in that valve rod is a taper arc surface structure.