CN216477707U

CN216477707U - Pump head of plunger pump

Info

Publication number: CN216477707U
Application number: CN202123177237.1U
Authority: CN
Inventors: 陈亨俭
Original assignee: Taizhou Mingyu Electromechanical Co ltd
Current assignee: Taizhou Mingyu Electromechanical Co ltd
Priority date: 2021-12-16
Filing date: 2021-12-16
Publication date: 2022-05-10
Anticipated expiration: 2031-12-16

Abstract

The utility model relates to a pump head of a plunger pump, which comprises a crankcase and a cylinder body; an installation cavity for installing a crankshaft and plungers is formed in the crankcase, the crankshaft is connected with each plunger through an integrated connecting rod, so that when the crankshaft rotates, the crankshaft can drive each plunger to reciprocate along the length direction of the crankshaft through the integrated connecting rod; the cylinder body is detachably and hermetically connected with the crankcase, a plurality of water inlet and outlet channels which are in one-to-one correspondence communication with the plungers are arranged on the cylinder body, and a water inlet and outlet valve is arranged at an inlet and an outlet of each water inlet and outlet channel; the crankcase is further provided with a flange used for being connected with input power, and the crankshaft is provided with a connecting groove for inserting the input power. This application has simple structure, simple to operate's advantage.

Description

Pump head of plunger pump

Technical Field

The utility model relates to a plunger pump technical field, concretely relates to plunger pump head.

Background

The plunger pump is an important device of the hydraulic system. The plunger reciprocates in the cylinder body to change the volume of the sealed working cavity so as to absorb and press oil. The plunger pump has the advantages of high rated pressure, compact structure, high efficiency, convenient flow regulation and the like, and is widely applied to occasions with high pressure, large flow and flow needing regulation, such as hydraulic machines, engineering machinery and ships. The plunger pump is an important device of the hydraulic system. The plunger reciprocates in the cylinder body to change the volume of the sealed working cavity so as to absorb and press oil.

The existing crankshaft plunger pump drives a crankshaft to rotate through a motor, so that a plunger is driven to reciprocate in a cylinder body. However, the existing crankcase has the defects of complex structure and high maintenance difficulty.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a plunger pump head to the above-mentioned problem that exists among the prior art.

In order to realize the purpose of the utility model, the utility model adopts the following technical scheme: the plunger pump head comprises a crankcase and a cylinder body; an installation cavity for installing a crankshaft and plungers is formed in the crankcase, the crankshaft is connected with each plunger through an integrated connecting rod, so that when the crankshaft rotates, the crankshaft can drive each plunger to reciprocate along the length direction of the crankshaft through the integrated connecting rod; the cylinder body is detachably and hermetically connected with the crankcase, a plurality of water inlet and outlet channels which are in one-to-one correspondence communication with the plungers are arranged on the cylinder body, and a water inlet and outlet valve is arranged at an inlet and an outlet of each water inlet and outlet channel; the crank case is also provided with a flange used for being connected with input power, and the crank shaft is provided with a connecting groove for inserting the input power.

The working principle and the beneficial effects are as follows: 1. compared with the prior art, this application is connected with input power through the flange, input power can drive the bent axle rotatory, thereby drive the integral type connecting rod, the integral type connecting rod drives plunger reciprocating motion and pumps the operation to the water passageway of intaking and exporting, realize the pumping function, wherein, the flange has replaced traditional shaft coupling, need insert the spread groove with input power's axle in, realize coaxial swivelling joint with modes such as keyway, thereby the installation degree of difficulty has been reduced, and saved and be used for providing the spring of resilience force for the plunger in the traditional structure, and adopt the integral type connecting rod to connect the plunger, not only improved life, therefore spring life is limited, and the structure has been simplified, further the installation degree of difficulty has been reduced.

Further, each integral connecting rod is connected with each plunger through a connecting pin. With the arrangement, the integrated connecting rod and the plunger can be conveniently connected.

Further, the connecting pin is in interference fit with the plunger. This setting can prevent to scurry about the connecting pin, prevents to scurry the round pin phenomenon and takes place to avoid bringing the damage to crankcase inner wall and integral type connecting rod.

Further, the connecting pin is in clearance fit with the integrated connecting rod. This arrangement makes it easier for the lubricating oil to form a lubricating oil film in the clearance, thereby reducing wear under high stress and high temperature due to friction between the fittings.

Furthermore, still be equipped with the back lid of dismantling the connection on the crankcase, be equipped with first oil window on this back lid. This setting can conveniently observe the inside lubricating oil mass of crankcase through the first oil window on the back lid, and the back lid can be dismantled moreover, further improves the maintainability of this pump head.

Further, the plunger includes plunger seat, ceramic pipe and locking screw, the locking screw passes the ceramic pipe inside with plunger seat spiro union, the ceramic pipe with be equipped with the copper gasket between the plunger seat, the locking screw with be equipped with the sealing washer between the locking screw, just the external diameter of copper gasket is greater than the ceramic pipe with the external diameter of plunger seat. This setting provides a simple structure and long service life's plunger, this plunger can keep and the mounting hole between sliding connection through the copper gasket, so both can reduce area of contact, improve the smooth and easy degree of plunger motion, can also protect ceramic pipe to be difficult to the pipe explosion.

Furthermore, a water guide groove is formed in the copper gasket. When the sealing ring between the locking screw and the ceramic tube is damaged under the pressure of high-pressure water, the high-pressure water pressure leaked into the ceramic tube through the damaged sealing ring can be discharged through the water chute, so that the ceramic tube is prevented from being burst by the high pressure existing on the inner side of the ceramic tube.

Furthermore, an oil filling screw detachably connected with the crankcase is arranged on the crankcase. The oiling operation can be conveniently carried out in the crankcase by detaching the oiling screw.

Furthermore, an oil window end cover detachably connected with the crankcase is further arranged on the crankcase, a second oil window is arranged on the oil window end cover, and the second oil window and the first oil window are respectively located on the side faces of the crankcase in different directions. The condition in the crankcase can be observed from different positions through the second oil tank, so that the internal oil quantity can be judged more conveniently.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is an exploded view of the present invention;

FIG. 3 is an enlarged view of the connecting pin and integral link of FIG. 2;

fig. 4 is a cross-sectional view of the crankcase.

In the figure, 1, crankcase; 2. a cylinder body; 3. an oil window end cover; 4. a flange; 5. a rear cover; 6. a water inlet and outlet valve; 7. an integral link; 8. a crankshaft; 9. a plunger; 10. a link pin; 11. a needle bearing; 12. an oiling screw; 31. a second oil window; 51. a first oil window; 81. connecting grooves; 91. a plunger seat; 92. a ceramic tube; 93. locking screws; 94. a seal ring; 95. a copper gasket; 911. a water chute.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art all belong to the protection scope of the present invention.

As shown in fig. 1-2, the pump head of the plunger pump includes a crankcase 1 and a cylinder body 2, wherein the crankcase 1 is fixed to the cylinder body 2 by screws, the crankcase 1 is further fixed to a rear cover 5 and an oil window end cover 3 by screws and other sealing members, wherein the rear cover 5 is provided with a first oil window 51, the oil window end cover 3 is provided with a second oil window 31, and the second oil window 31 and the first oil window 51 are respectively located on the side surfaces of the crankcase 1 in different directions, so that the internal condition of the crankcase 1 can be observed from different positions to judge whether to perform maintenance or not and to perform lubricating oil adding operation or not. The rest oil seals, O-shaped rings, screws and the like are not described in detail, and the installation modes are the prior art in the field. Other parts are also shown in fig. 2, and are all in conventional arrangement, which is not an important technical solution of the present application, and therefore, the details thereof are not described.

Preferably, a fuel filling opening (a circular hole in fig. 4) is further formed in the top of the crankcase 1, a fuel filling screw 12 is screwed on the fuel filling opening, and the fuel filling operation can be conveniently performed in the crankcase 1 by removing the fuel filling screw 12.

Specifically, referring to fig. 4, a mounting cavity for mounting the crankshaft 8 and the plungers 9 is provided in the crankcase 1, and the crankshaft 8 and each plunger 9 are connected through an integrated connecting rod 7, so that when the crankshaft 8 rotates, the crankshaft 8 can drive each plunger 9 to reciprocate along the length direction thereof through the integrated connecting rod 7, wherein the purpose of the mounting cavity is not only for mounting the crankshaft 8 and the plungers 9, but also for accommodating lubricating oil, and the mounting cavity further has a mounting hole (not shown in the drawings, but on the same straight line with the plunger 9) for guiding the plunger 9. The connecting rod of integral type assembly is comparatively convenient, can exchange, is particularly suitable for being used in under the low discharge environment of middling pressure.

As shown in fig. 3, each plunger 9 includes a plunger seat 91 connected to the connecting pin, a ceramic tube 92, and a locking screw 93, the locking screw 93 penetrates through the inside of the ceramic tube 92 to be screwed with the plunger seat 91, a copper gasket 95 is disposed between the ceramic tube 92 and the plunger seat 91, a sealing ring 94 is disposed between the locking screw 93 and the locking screw 93, and the outer diameter of the copper gasket 95 is greater than the outer diameters of the ceramic tube 92 and the plunger seat 91. This setting provides a simple structure and long service life's plunger 9, and this plunger 9 can keep and the mounting hole between sliding connection through copper gasket 95, so both can reduce area of contact, improve the smooth and easy degree of plunger 9 motion, can also protect ceramic pipe 92 to be difficult to the pipe explosion.

Preferably, the plunger seat 91 is connected with the integrated connecting rod 7 through the connecting pin, the connecting pin is in interference fit with the plunger seat 91, the connecting pin is in clearance fit with the integrated connecting rod 7, the left and right movement of the connecting pin can be prevented, the pin movement phenomenon is prevented, damage to the inner wall of the crankcase 1 and the integrated connecting rod 7 is avoided, lubricating oil can be made to form a lubricating oil film in the clearance more easily, and abrasion under high stress between accessories and high temperature caused by friction are reduced.

Preferably, the copper gasket 95 is provided with a water guiding groove 911, so that the ceramic tube 92 is protected from bursting when the sealing ring 94 is broken. When the sealing ring 94 between the locking screw 93 and the ceramic tube 92 is damaged under the pressure of the high-pressure water, the water guide channel 911 can discharge the high-pressure water pressure leaking into the ceramic tube 92 through the damaged sealing ring 94, so as to prevent the ceramic tube 92 from bursting due to the high pressure existing inside the ceramic tube 92.

In this embodiment, the cylinder body 2 is provided with a plurality of water inlet and outlet channels which are communicated with the plungers 9 in a one-to-one correspondence manner, and an inlet and an outlet of each water inlet and outlet channel are provided with a water inlet and outlet valve 6.

In this embodiment, the crankcase 1 is further provided with a flange 4 for connecting with an input power, the crankshaft 8 is provided with a connecting groove 81 for inserting the input power, an input shaft of the input power (motor) is inserted into the connecting groove 81 and fixed by a key groove, so that the input shaft can drive the crankshaft 8 to rotate, and a needle bearing 11, an oil seal and the like are arranged between the flange 4 and the crankcase 1, which will not be described herein.

The part of the utility model which is not described in detail is the prior art, so the utility model does not detail the part.

It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.

It will be understood by those skilled in the art that in the disclosure of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships that are based on those shown in the drawings, which are merely for convenience in describing the present invention and to simplify the description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus the terms are not to be construed as limiting the invention.

Although the terms of the crankcase 1, the cylinder block 2, the oil window end cover 3, the flange 4, the rear cover 5, the water inlet/outlet valve 6, the integrated connecting rod 7, the crankshaft 8, the plunger 9, the connecting rod pin 10, the needle bearing 11, the oiling screw 12, the second oil window 31, the first oil window 51, the connecting groove 81, the plunger seat 91, the ceramic tube 92, the locking screw 93, the sealing ring 94, the copper gasket 95, the water guide groove 911, etc. are used more frequently, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

The present invention is not limited to the above-mentioned preferred embodiments, and any person can obtain other products in various forms without departing from the scope of the present invention, but any change in shape or structure is made, and all the technical solutions identical or similar to the present application fall within the protection scope of the present invention.

Claims

1. The plunger pump head is characterized by comprising a crankcase and a cylinder body; an installation cavity for installing a crankshaft and plungers is formed in the crankcase, the crankshaft is connected with each plunger through an integrated connecting rod, so that when the crankshaft rotates, the crankshaft can drive each plunger to reciprocate along the length direction of the crankshaft through the integrated connecting rod; the cylinder body is detachably and hermetically connected with the crankcase, a plurality of water inlet and outlet channels which are in one-to-one correspondence communication with the plungers are arranged on the cylinder body, and a water inlet and outlet valve is arranged at an inlet and an outlet of each water inlet and outlet channel; the crank case is also provided with a flange used for being connected with input power, and the crank shaft is provided with a connecting groove for inserting the input power.

2. A plunger pump head as claimed in claim 1, wherein each integral connecting rod is connected to each plunger by a connecting pin.

3. A plunger pump head as claimed in claim 2, wherein the connecting pin is an interference fit with the plunger.

4. A plunger pump head as claimed in claim 3, wherein the connecting pin is a clearance fit with the integral connecting rod.

5. A plunger pump head as claimed in claim 1, wherein a detachably attached rear cover is provided on the crankcase, the rear cover being provided with a first oil window.

6. A plunger pump head as claimed in any one of claims 1 to 5, wherein the plunger comprises a plunger seat, a ceramic tube and a locking screw passing through the interior of the ceramic tube and threadedly engaged with the plunger seat, a copper washer being provided between the ceramic tube and the plunger seat, a sealing ring being provided between the locking screw and the locking screw, and the outer diameter of the copper washer being greater than the outer diameters of the ceramic tube and the plunger seat.

7. A plunger pump head as claimed in claim 6, wherein the copper shim has water channels.

8. A plunger pump head as claimed in claim 5, wherein the crankcase is provided with a detachably connected refuelling screw.