CN204827830U - Plunger pump - Google Patents

Abstract

The utility model relates to a pump, in particular to a reciprocating pressurized plunger pump. It includes a power end and a hydraulic end; wherein the power end includes a box body and a power transmission mechanism; the box body includes a rear cover plate located at the rear end of the box body, an upper cover plate located at the upper end of the box body, and respectively located on the box body, Breathable cap and magnetic device on the lower side; the power transmission mechanism includes crankshaft, bearing bush, connecting rod, crosshead pin, crosshead and intermediate rod; the pump head mechanism includes liquid inlet, liquid outlet, upper pressure Cover, liquid inlet device, liquid discharge device, valve body; the utility model has the advantages of convenient maintenance, easy use, safe use, and reduced labor intensity of water injection workers, and also has the advantage of being exposed without a balance pipe.

Description

a plunger pump

technical field

The invention relates to a pump, in particular to a reciprocating plunger pump.

Background technique

The plunger pump is an important device of the hydraulic system. It relies on the reciprocating movement of the plunger in the cylinder to change the volume of the sealed working chamber to realize liquid suction and discharge. The plunger pump has the advantages of high rated pressure, compact structure, high efficiency and convenient flow adjustment. It is widely used in high pressure, large flow and flow adjustment occasions, such as oil field sewage reinjection, cleaning machines, construction machinery and ships.

There is following shortcoming in existing plunger pump:

The box body cannot be processed at one time, which is inconvenient and prone to safety problems in the process of production and maintenance;

Traditional plunger pumps have external balance tubes in the pump body. Because the balance tubes are exposed to the outside, it is unsafe to use and easy to leak.

Contents of the invention

The purpose of the present invention is to provide a plunger pump to solve the problem that the existing plunger pump cannot complete the one-time processing of the packing sleeve positioning hole, the oil retaining head body seat, and the cylinder body, and because the balance pipe is unsafe and difficult to use. Inconvenient question.

In order to solve the above problems, the invention provides a plunger pump, which includes a tank and a pump head connected to the tank, and is characterized in that it also includes a power end and a fluid end;

The power end includes a box, and the box body is composed of a rear cover plate at the rear end, an upper cover plate located at the upper end of the box body, and a respirator and an oil window respectively located on the upper and lower sides of the box body;

The power end also includes a crankshaft, a bearing bush, a connecting rod, a crosshead pin, a crosshead and an intermediate rod, wherein one end of the connecting rod is connected to the crankshaft through the bearing bush, and the other end is connected to the crosshead through a crosshead pin, wherein the crosshead Connected with the middle rod; the plunger guiding device includes a packing sleeve, a sealing letter, an adjusting nut, and a plunger chamber, wherein the plunger chamber is a hollow chamber inside, and a part of the plunger chamber is arranged inside the pump head , the other part is set inside the box body, wherein a sealing letter is set outside the plunger cavity inside the pump head, and a stuffing sleeve is set outside the plunger cavity inside the box body, and the stuffing sleeve is connected to one side of the pump head , wherein the inner cavity of the packing sleeve is connected with a part of the plunger;

The pump head mechanism includes a liquid inlet, a liquid outlet, an upper gland, a liquid inlet device, a liquid discharge device, and a valve body, wherein the liquid inlet device includes a large liquid inlet spring and a large liquid inlet valve plate, and the liquid discharge device includes Discharge spring and small valve plate for liquid discharge. The valve body is an I-shaped structure with trapezoidal hollow on both sides. One side is vertically connected to the liquid inlet. The lower end of the large valve plate is connected with a large liquid inlet spring, and the upper end of the valve body is connected with a small liquid discharge valve plate. The upper end of the small liquid discharge valve plate is connected with a large liquid discharge spring and a small spring. liquid channel.

Further, the tail end of the plunger is provided with a plunger cap and is connected with the middle rod through the water baffle.

The large liquid-inlet spring in the further pump head mechanism is connected with the plunger cavity through the cavity.

Further, one end of the liquid discharge channel in the pump head mechanism is connected to the plunger cavity, and the other end is connected to the discharge pressure regulator.

Further, the rear cover plate and the upper cover plate of the box body are respectively connected with the box body through nuts.

The further crankshaft is an eccentric shaft, which is connected with the crankshaft through connecting rod bushes and connecting rod bolts.

A further plunger includes a front end integrally formed with a rear end, wherein the diameter of the front end is larger than the rear end, wherein the diameter of the plunger depends on the required pressure and displacement.

A spring seat is arranged on the upper part of the large and small springs for further liquid drainage.

Beneficial effects: the invention relates to a plunger pump which has the advantages of convenient maintenance, easy installation, safe use, reduced labor intensity of water injection workers, and the advantage of no exposed balance pipe.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the invention.

Fig. 2 is a partially enlarged schematic diagram of the plunger mechanism of the invention.

Fig. 3 is a partially enlarged schematic diagram of the pump head mechanism of the invention.

Among them: 100-box 101-rear cover 102-upper cover 103-breather cap 104-crankshaft 105-bearing bush 106-connecting rod bolt 107-connecting rod 108-cross head 109-cross head pin 110-middle rod 111- Shaft sleeve 112- water retaining plate 113- magnetic device 201- plunger 202- plunger cavity 203- packing sleeve 204- plunger cap 205- sealing letter 300- pump head 301- liquid inlet 302- liquid outlet 303- Valve body 304-inlet large valve plate 305-inlet large spring 306-discharge large, small spring 307-discharge small valve plate 308-spring seat.

Detailed ways

The invention will be further described below in conjunction with the accompanying drawings.

In order to make the purpose and features of the invention more obvious and understandable, the specific implementation manners of the invention will be further described below in conjunction with the accompanying drawings. It should be noted that the drawings are all in a very simplified form and use imprecise ratios, which are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention.

A plunger pump provided by the invention, as shown in Figures 1 to 3, includes a box body 100 and a pump head 300 connected to the box body, and also includes a power transmission mechanism, a plunger guide mechanism, and a pump head mechanism; The casing includes a rear cover 101 positioned at the rear end of the casing 100, an upper cover 102 positioned at the upper end of the casing and a breathable cap and a magnetic device 113 respectively positioned on the upper and lower sides of the casing; the power transmission mechanism includes a crankshaft 104, Bearing bush 105, connecting rod 107, crosshead pin 109, crosshead 108 and intermediate rod 110, wherein one end of the connecting rod is connected to crankshaft 104 through bearing bush 105, and the other end is connected to crosshead 108 through crosshead pin 109, wherein the crosshead 108 is connected with the middle rod 110;

The plunger guiding device includes a stuffing sleeve 203, a sealing letter 205, and a plunger chamber 202, wherein the plunger chamber 202 is a hollow chamber, wherein part of the plunger chamber is arranged inside the pump head, and the other part is arranged inside the box body , wherein a sealing gland 205 is provided outside the plunger chamber inside the pump head 300, and a packing sleeve 203 is provided outside the plunger chamber inside the box, wherein the packing sleeve 203 is connected to one side of the pump head 300, and the packing The inner cavity of the sleeve is connected with a part of the plunger 201;

The pump head mechanism includes a liquid inlet 301, a liquid outlet 302, a liquid inlet device, a liquid discharge device, and a valve body, wherein the liquid inlet device includes a large liquid inlet spring 305, a large liquid inlet valve piece 304, and the liquid discharge device includes a liquid discharge spring. 306. Small liquid discharge valve piece 307, wherein the valve body 303 is an I-shaped structure with trapezoidal hollow on both sides, one side of which is vertically connected to the liquid inlet 301, and the lower end of the valve body 303 is connected to the large liquid inlet valve piece 304 The lower end of the large liquid inlet valve is connected with the large liquid inlet spring 303, the upper end of the valve body 303 is connected with the small liquid discharge valve 307, and the upper end of the small liquid discharge valve 307 is connected with the large and small liquid discharge springs 306, and the liquid outlet is vertical In the discharge channel set in the pump head.

Further, as shown in FIG. 1 and FIG. 2 , a plunger cap 204 is provided at the end of the plunger to connect with the middle rod 110 through the water baffle 112 .

Further, as shown in FIG. 3 , the large liquid-inlet spring 305 in the pump head mechanism is connected with the plunger cavity 202 through a cavity.

Further, one end of the discharge channel in the pump head mechanism shown in FIG. 1 is connected to the plunger chamber 305 , and the other end is connected to the wall of the pump head.

Further, the rear cover 101 and the upper cover 102 of the box shown in FIG. 1 are respectively connected to the box 100 through nuts.

Further, the crankshaft 104 shown in FIG. 1 is an eccentric shaft, which is connected with the connecting rod 107 through the connecting rod bolt 106 .

Further, the plunger 201 shown in FIG. 1 includes a front end and a rear end integrally formed, wherein the width of the front end is greater than that of the rear end, and the length of the integral plunger 201 is greater than the length of the plunger cavity 202 .

Further, as shown in FIG. 1 , one end of the crankshaft 104 connected to the crosshead 108 is provided with a bushing 111 on the crankshaft 104 .

Further, as shown in FIG. 1 , a spring seat 308 is provided on the upper part of the large and small liquid discharge springs 306 .

In summary, the plunger pump provided by the present invention includes a casing 100 and a pump head 300 connected to the casing, and also includes a power transmission mechanism, a plunger guide mechanism, and a pump head mechanism; The rear cover plate 101 at the rear end of the body 100, the upper cover plate 102 positioned at the upper end of the box body and the breathable cap and the magnetic device 113 located at the upper and lower sides of the box body respectively; 107. Crosshead pin 109, crosshead 108 and intermediate rod 110, wherein one end of the connecting rod is connected to the crankshaft 104 through the bearing bush 105, and the other end is connected to the crosshead 108 through the crosshead pin 109, wherein the crosshead 108 is connected to the intermediate rod 110 The rear cover 101 and the upper cover 102 of the box are respectively connected to the box 100 through nuts; a water baffle 112 is also provided, and the plunger cap 204 arranged at the tail of the plunger is connected to the middle rod 110 connect. The crankshaft structure and plunger mechanism are assembled in the box formed by one-time processing. The box is mainly connected by nuts, and the traditional line connection is changed to surface contact to enhance the sealing. The plunger guiding device includes a stuffing sleeve 203, a sealing letter 205, and a plunger chamber 202, wherein the plunger chamber 202 is a hollow chamber, wherein part of the plunger chamber is arranged inside the pump head, and the other part is arranged inside the box body , wherein a sealing gland 205 is provided outside the plunger chamber inside the pump head 300, and a packing sleeve 203 is provided outside the plunger chamber inside the box, wherein the packing sleeve 203 is connected to one side of the pump head 300, and the packing The inner cavity of the sleeve is connected with a part of the plunger 201 ; The plunger bushing in the plunger guide device in the traditional plunger pump is canceled, and the structure of the plunger itself is used for radial positioning. One end of the discharge channel in the pump head mechanism is connected with the plunger chamber 305, and the inlet in the liquid inlet The large liquid spring 305 is connected with the plunger chamber 202 through the cavity, and the plunger 201 moves radially in the plunger chamber 202 to generate positive and negative pressures. When there is negative pressure, the large liquid inlet spring 305 in the liquid inlet device is elongated under the influence of negative pressure, so that the large liquid inlet valve plate 304 arranged at the upper end moves downward under the influence of gravity to open the valve. At this time, the liquid passes through The liquid inlet enters the valve body 303 and then enters the plunger cavity 202; when the plunger 201 moves to the top to generate positive pressure, the large liquid inlet spring 305 in the liquid inlet device is compressed, and the large liquid inlet valve piece 304 is closed, which When the liquid remains in the plunger cavity, it enters the discharge port through the discharge channel connected with the plunger cavity for discharge to complete an action.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims (9)

1. A new pressurized reciprocating plunger pump, including a power end and a fluid end, characterized in that: a power end and a fluid end; The power end includes a box body, a crankshaft, a bearing bush, a connecting rod, a crosshead pin, a crosshead, and an intermediate rod. One end of the connecting rod is connected to the crankshaft through the bearing bush, and the other end is connected to the crosshead through a crosshead pin. connected to the middle rod; The liquid end includes a pump head and a packing sleeve assembly. The pump head includes a liquid inlet, a liquid outlet, an upper gland, a liquid inlet device, a liquid discharge device, and a valve body. The liquid inlet device includes a large liquid inlet spring, an inlet The liquid discharge device includes a liquid discharge spring and a small liquid discharge valve. The valve body is an I-shaped structure with trapezoidal hollow on both sides, one side is vertically connected to the liquid inlet, and the lower end of the valve body is connected to the inlet. The large liquid valve is connected to each other, the large liquid inlet spring is connected to the lower end of the large liquid inlet valve, and the small liquid discharge valve is connected to the upper end of the valve body, and the upper end of the small liquid discharge valve is connected to the large and small liquid discharge spring. Perpendicular to the discharge channel provided in the pump head. 2. The plunger assembly includes packing sleeve, plunger cavity, packing, pressure sleeve, guide ring, and large pressure cap. The plunger cavity is a hollow cavity inside, and part of the plunger cavity is set on the pump head. Inside, the other part is set inside the box body, wherein a sealing letter is set outside the plunger cavity inside the pump head, and a packing sleeve is set outside the plunger cavity inside the box body, and the stuffing sleeve is connected to one side of the pump head. connect; A plunger pump according to claim 1, characterized in that the tail end of the plunger is provided with a plunger cap connected to the middle rod through a water baffle. 3. A plunger pump according to claim 1, characterized in that the large liquid-inlet spring in the pump head is vertically connected to the plunger chamber through a cavity. 4. A plunger pump according to claim 1, characterized in that one end of the discharge channel in the pump head is connected to the cylinder cavity, and the other end is connected to the discharge regulator. 5. A plunger pump according to claim 1, characterized in that, the rear cover and the upper cover of the box are respectively connected to the box by nuts. 6. A plunger pump according to claim 1, characterized in that the crankshaft is an eccentric shaft connected to the connecting rod through connecting rod bolts. 7. A plunger pump according to claim 1, wherein the plunger includes a front end and a rear end integrally formed, wherein the diameter of the front end is larger than that of the rear end, and the diameter depends on the required pressure and discharge. quantity. 8. A plunger pump according to claim 1, characterized in that, one end of the crankshaft connected to the crosshead is provided with a bearing bush on the crankshaft. 9. A plunger pump according to claim 1, characterized in that a spring seat is arranged on the upper part of the large and small discharge springs.