CN203114612U - Metal diaphragm pump fluid end - Google Patents

Abstract

The utility model discloses a hydraulic end of a metal diaphragm pump, which comprises a pump head body and a valve combination, a liquid suction valve cover and a liquid discharge valve cover in the valve combination are respectively fixed with a valve seat, and inside the central through hole of the liquid suction valve cover. A guide sleeve is provided, and the guide sleeve cooperates with the stop of the liquid suction valve cover. The liquid suction valve plate is sleeved on the guide sleeve and can slide left and right. The suction valve spring is located between the liquid suction valve plate and the liquid suction valve cover. A central guide hole is provided on the joint side of the discharge valve cover and the valve seat. The discharge valve plate is located in the center guide hole and can slide left and right. A discharge valve spring is provided between the discharge valve plate and the discharge valve cover. The utility model has an annular groove on the pump head body, which does not weaken the strength of the valve seat, and can significantly improve the strength of the valve seat and the liquid suction valve cover; Problem; The inside of the suction valve cover is grooved, and the flow of the medium is better.

Description

Liquid end of a metal diaphragm pump

technical field

The utility model relates to the improvement of diaphragm pump technology, specifically a liquid end of a metal diaphragm pump, which belongs to the technical field of pumps.

Background technique

Combination valve is one of the important parts of high-pressure reciprocating pump, which is directly related to the use effect and performance of the pump. Usually the combination valve is mainly composed of suction valve plate, suction valve spring, suction valve cover, valve seat, discharge valve plate, discharge valve spring, discharge valve cover and various seals. In the liquid end structure of the metal diaphragm pump, the conventional combination valve is to set the valve seat inside the suction valve cover, and the annular groove is opened on the valve seat. This structure increases the size of the valve group. There is no guide sleeve, and the suction valve plate is partially guided by the outer circle, which is easy to get stuck. At the same time, the various components of the existing combination valve at the liquid end of the diaphragm pump are assembled in the chamber of the pump head body, which increases the difficulty and efficiency of installation.

Contents of the invention

Aiming at the above-mentioned deficiencies in the prior art, the purpose of this utility model is to provide a fluid end of a metal diaphragm pump that can effectively reduce size, move smoothly and be easily assembled.

The technical scheme of the utility model is achieved in that:

A liquid end of a metal diaphragm pump, comprising a pump head body and a valve assembly installed in the chamber of the pump head body, the valve assembly includes a suction valve plate, a suction valve spring, a suction valve cover, a valve seat, and a discharge valve Plate, discharge valve spring and liquid discharge valve cover, characterized in that: the liquid suction valve cover and the liquid discharge valve cover are respectively located on the left and right sides of the valve seat and fixed as one, the liquid suction valve cover is provided with a central through hole, and the central through hole There is a guide sleeve inside, which cooperates with the stop of the suction valve cover. The suction valve plate can slide left and right on the guide sleeve and limit the sliding stroke through the end face of the guide sleeve. The suction valve spring is located on the suction valve. between the discharge valve cover and the valve seat, there is a central guide hole, the discharge valve plate is located in the center guide hole and can slide left and right, between the discharge valve plate and the discharge valve cover There is a discharge valve spring, under the action of the discharge valve spring, the discharge valve plate is pressed against the valve seat;

There is an annular groove A communicating with the liquid suction port on the wall of the pump head body chamber, and an annular groove C is provided on the liquid suction valve cover. The annular groove A on the pump head body chamber wall and the annular groove on the liquid suction valve cover C communicates through the channel on the valve seat, and the annular groove C on the suction valve cover communicates with the liquid cylinder chamber through the liquid suction hole on the liquid suction valve cover, and a plunger is arranged in the liquid cylinder chamber; the liquid cylinder chamber passes through The central hole of the guide sleeve communicates with the central hole of the valve seat; the axial drain hole and the radial drain hole communicated with each other are arranged on the drain valve cover, and the radial drain hole communicated with the radial drain is arranged on the drain valve cover wall. The annular groove H, the annular groove H communicates with the drain port at the same time. The axial drain hole on the drain valve cover communicates with the center hole of the valve seat when the drain valve plate is opened.

Further, the valve combination is installed in the chamber of the pump head body through the pressure plate, and the pressure plate is pressed on the discharge valve cover, and the two ends of the suction valve cover are respectively matched with the pump head body and the valve seat through the seam, and the valve seat and the discharge valve The valve cover is fit through seams, and a seal is provided at each seam fit position.

Compared with the prior art, the utility model has the following beneficial effects:

1. There is an annular groove on the pump head body, which does not weaken the strength of the valve seat, can significantly improve the strength of the valve seat and the suction valve cover, and can effectively reduce the parts and the overall size.

2. The liquid suction valve plate adopts the overall guidance of the guide sleeve, which solves the problem of valve sticking better, and the moving parts of the valve group move more smoothly.

3. The inside of the suction valve cover is grooved, and the flow of the medium is better.

4. The whole valve combination can be assembled into a whole outside the pump head and then installed into the pump head body, and pressed by the pressure plate, which makes the installation easier and more efficient.

Description of drawings

Fig. 1 - structural representation of the utility model.

Detailed ways

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

Referring to Fig. 1, it can be seen from the figure that the hydraulic end of the metal diaphragm pump of the present invention includes a pump head body 1 and a valve assembly installed in the chamber of the pump head body, the valve assembly includes a liquid suction valve plate 8, a suction valve The valve spring 10, the liquid suction valve cover 6, the valve seat 5, the liquid discharge valve plate 4, the discharge valve spring 3 and the liquid discharge valve cover 2, are characterized in that: the liquid suction valve cover 6 and the liquid discharge valve cover 2 are respectively located on the valve seat 5 each side on the left and right is fixed as a whole by bolt 7. The liquid suction valve cover 6 is provided with a central through hole, and a guide sleeve 11 is arranged in the central through hole, and the guide sleeve 11 cooperates with the liquid suction valve cover 6 through the seam. The suction valve spring 10 is located between the liquid suction valve plate 8 and the liquid suction valve cover 6 through the end face on the guide sleeve to limit the sliding stroke. There is a central guide hole on the side where the discharge valve cover 2 and the valve seat 5 are combined, the discharge valve plate 4 is located in the center guide hole and can slide left and right, and a discharge valve is provided between the discharge valve plate 4 and the discharge valve cover 2 The spring 3, under the action of the discharge valve spring 3, the discharge valve plate 4 bears on the valve seat 5.

An annular groove A17 communicating with the liquid suction port is provided on the chamber wall of the pump head body 1, and an annular groove C15 is provided on the liquid suction valve cover 6. The annular groove C15 of the valve seat communicates with the channel 16 on the valve seat, the annular groove C15 on the suction valve cover communicates with the liquid cylinder chamber 13 through the liquid suction hole 14 on the liquid suction valve cover, and the cylinder chamber 13 is provided with a column Plug 12. The cylinder chamber 13 communicates with the center hole 18 of the valve seat through the central hole of the guide sleeve; An annular groove H21 communicating with the radial drain hole 20 is provided on the wall, and the annular groove H21 communicates with the drain port at the same time. The axial drain hole on the drain valve cover communicates with the center hole of the valve seat when the drain valve plate is opened.

The valve combination is installed in the chamber of the pump head body 1 through the pressure plate 22, and the pressure plate 22 is pressed on the discharge valve cover 2, and the two ends of the suction valve cover 6 are respectively matched with the pump head body 1 and the valve seat 5 through the seams. The valve seat 5 cooperates with the discharge valve cover 2 through a seam, and a sealing member 9 is provided at each seam mating position.

The structural feature of the utility model is that the valve group is made into an integrated component, which is convenient for overall installation. The liquid suction valve cover 6, the valve seat 5, and the liquid discharge valve plate 4 have a seam fit, and the bolts 7 are connected to form a whole. The guide sleeve 11 is installed between the liquid suction valve cover 6 and the valve seat 5, the liquid suction valve plate 8 is set on the guide sleeve 11, can slide along the guide sleeve, and is guided by the inner hole of the liquid suction valve plate. The liquid discharge valve plate 4 is installed between the valve seat 5 and the liquid discharge valve cover 2 , and the liquid discharge spring 3 is installed between the liquid discharge valve plate 4 and the liquid discharge valve cover 2 .

The utility model achieves the function of conveying medium through the opening and closing of the liquid suction valve plate 8 and the liquid discharge valve plate 4, and has the characteristics of bearing ultra-high pressure. Its working principle is: when the plunger 12 moves to the left, the liquid suction The valve plate 8 is opened, the discharge valve plate 4 is closed, and the medium enters the liquid cylinder cavity from the liquid suction port through the annular groove A17 on the pump head body, the valve seat channel 16, the annular groove C15 on the liquid suction valve cover and the liquid suction hole 14 chamber 13; when the plunger 12 moves to the right, the liquid suction valve plate 8 is closed, and the liquid discharge valve plate 4 is opened, and the medium entering the liquid cylinder chamber passes through the center hole of the guide sleeve, the center hole 18 of the valve seat, and the liquid discharge valve in turn. Cover axial drain hole 19, radial drain hole 20 and annular groove H21 enter the drain port to complete a cycle.

The utility model has an annular groove on the pump head body, which does not weaken the strength of the valve seat, and can significantly improve the strength of the valve seat and the liquid suction valve cover; Problem: The inside of the suction valve cover is grooved, and the flow of the medium is better.

The above-mentioned embodiments of the utility model are only examples for illustrating the utility model, rather than limiting the implementation of the utility model. For those of ordinary skill in the art, other variations and modifications in various forms can be made on the basis of the above description. All the implementation manners cannot be exhaustively listed here. All obvious changes or variations derived from the technical solutions of the utility model are still within the scope of protection of the utility model.

Claims (2)

1. metal diaphragm pump hydraulic end, the valve that comprises pump head body and be installed in the pump head body chamber makes up, described valve combination comprises the imbibition valve plate, inhale valve spring, the imbibition valve gap, valve seat, the discharge opeing valve plate, valve spring and discharge opeing valve gap, it is characterized in that: imbibition valve gap and discharge opeing valve gap lay respectively at about valve seat each side and are fixed as one, liquid sucting valve is covered with central through bore, be provided with guide sleeve in the central through bore, guide sleeve cooperates with imbibition valve gap seam, the liquid sucting valve sleeve-board can horizontally slip on the guide sleeve and spacing to sliding stroke by the end face on the guide sleeve, inhales valve spring between imbibition valve plate and imbibition valve gap; Be combined that face with valve seat at the discharge opeing valve gap and be provided with the centre pilot hole, the discharge opeing valve plate is positioned at the centre pilot hole and can horizontally slips, and is provided with the valve spring between discharge opeing valve plate and the discharge opeing valve gap, and under the effect of valve spring, the discharge opeing valve plate withstands on the valve seat;

Be provided with the circular groove A that communicates with liquid sucting port at the pump head body chamber wall, cover at liquid sucting valve and to be provided with circular groove C, the circular groove C that circular groove A on the pump head body chamber wall and liquid sucting valve cover is by the channel connection on the valve seat, the circular groove C that liquid sucting valve covers is communicated with the fluid cylinder chamber by the imbibing hole that liquid sucting valve covers, and is provided with plunger in the fluid cylinder chamber; The fluid cylinder chamber is communicated with valve base center hole by the guide sleeve center hole; Cover at liquid discharging valve and to be provided with axial outage and the raidal drainage hole that is interconnected, be provided with the circular groove H that communicates with the raidal drainage hole at the liquid discharging valve tegmental wall, circular groove H is communicated with liquid port simultaneously; The axial outage that liquid discharging valve covers is communicated with valve base center hole when the discharge opeing valve plate is opened.

2. metal diaphragm pump hydraulic end according to claim 1, it is characterized in that: described valve combination is installed in the pump head body chamber by pressing plate, pressing plate is pressed in liquid discharging valve and covers, imbibition valve gap two ends cooperate by seam with pump head body and valve seat respectively, valve seat cooperates by seam with the discharge opeing valve gap, cooperates the position to be provided with Sealing at each seam.