CN216789369U - Internal circulation pneumatic circulating valve of reciprocating pump - Google Patents

Abstract

The utility model relates to the technical field of reciprocating pumps, in particular to an internal circulation pneumatic circulating valve of a reciprocating pump, which comprises a valve body and an air cylinder, wherein the air cylinder is arranged on the valve body, an ejector rod is connected on the valve body in a sliding manner, one end of the ejector rod is positioned on the outer side of the valve body, one end of the ejector rod is positioned inside the valve body, the end part of a piston rod of the air cylinder is positioned inside the valve body, and one end of the ejector rod, which is positioned inside the valve body, is connected with the end part of the piston rod. The structure of the pneumatic circulating valve is simplified, and the production and the manufacture of the pneumatic circulating valve are facilitated.

Description

Internal circulation pneumatic circulating valve of reciprocating pump

Technical Field

The utility model relates to the technical field of reciprocating pumps, in particular to an internal circulation pneumatic circulating valve of a reciprocating pump.

Background

Some reciprocating pumps require intermittent delivery of high pressure media. In the past, the control is usually not realized in a mode of frequently starting and stopping the motor, but an external circulating valve system is installed at a hydraulic end, and high-pressure medium at the outlet of a pump is directly conveyed into a low-pressure pipeline at the inlet of the pump, so that the aim of temporarily conveying the high-pressure medium by a working pipeline is fulfilled. However, the high-pressure medium at the outlet of the pump is directly conveyed to the low-pressure pipeline at the inlet of the pump to complete work, which consumes energy and is not beneficial to energy conservation.

In view of the defects of the structure, the pneumatic circulating valve is arranged on the hydraulic end, the cone valve is arranged on the hydraulic end, the pneumatic circulating valve controls the cone valve at the inlet of the pump to be in an open state through air pressure to realize circulation of media at the inlet of the pump, hydraulic pressure cannot be built in the pump, so that high-pressure media are output in a pause mode, liquid cannot be conveyed from the outlet to the inlet, and energy consumption is reduced.

However, the existing pneumatic circulating valve includes a piston cylinder, a piston slidably connected in the piston cylinder, a push rod for controlling the cone valve, and a spring located in the piston cylinder, and the like, and the piston cylinder generates air pressure by introducing air into the piston cylinder, and the piston is controlled to reciprocate by the air pressure and the elastic force of the spring, so as to drive the push rod to move, thereby controlling the cone valve. The piston cylinder, the piston, the spring and other structures of the pneumatic circulating valve are not standard parts, mass production and assembly are not facilitated, meanwhile, the piston cylinder contains the spring and other structures, and the pneumatic circulating valve is complex in structure and inconvenient to manufacture.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an internal circulation pneumatic circulating valve of a reciprocating pump, so that the structure of the pneumatic circulating valve is simplified, and the production and the manufacture of the pneumatic circulating valve are facilitated.

In order to achieve the purpose, the utility model adopts the following technical scheme: the utility model provides a reciprocating pump inner loop pneumatic cycle valve, includes valve body and cylinder, and the cylinder is installed on the valve body, and sliding connection has the ejector pin on the valve body, and the one end of ejector pin is located the outside of valve body, and the other end of ejector pin is located the inside of valve body, and the tip of the piston rod of cylinder is located the inside of valve body, and the one end that the ejector pin is located the inside of valve body is in the same place with the end connection of piston rod.

The principle and the advantages of the scheme are as follows: install the valve body and serve at the hydraulic power of pump, the ejector pin is used for controlling the inside cone valve of the hydraulic end of pump, and this scheme directly adopts cylinder drive ejector pin to remove to the control of the inside cone valve of the hydraulic end of pump has been realized. The cylinder is a standard part, can be directly purchased, is convenient to install, omits non-standard part structures such as a spring and a piston on the pneumatic circulating valve, is convenient for batch production and manufacture of the pneumatic circulating valve, and simplifies the structure of the pneumatic circulating valve. The circulating valve in this scheme can be integrated on the pump, and the structure is small and exquisite, still is convenient for install and debug when saving the cost.

Preferably, as an improvement, the valve body comprises a pressure plate and a connecting pipe, one end of the connecting pipe is detachably connected with the pressure plate, and the ejector rod is connected to the pressure plate in a sliding mode. The pressure plate is adapted to be secured to the hydraulic end of the pump. Meanwhile, one end of the connecting pipe can be plugged by the pressing plate.

Preferably, as an improvement, the side of the pressure plate far away from the connecting pipe is provided with a pneumatic control valve seat, a guide sleeve is arranged between the pneumatic control valve seat and the pressure plate, and the ejector rod is connected in the guide sleeve in a sliding manner. The pneumatic control valve seat is used for being inserted into a mounting hole (the mounting hole is used for enabling the ejector rod to be inserted) of a hydraulic end of the pump, so that the pneumatic circulating valve is stably mounted on the hydraulic end and cannot move. The guide sleeve is used for guiding the sliding of the ejector rod, so that the ejector rod can slide more stably.

Preferably, as an improvement, the pressing plate is connected with a pressure filling oil cup, the pressing plate is provided with a first oil hole communicated with the pressure filling oil cup, the side surface of the guide sleeve is provided with a second oil hole communicated with the first oil hole. The pressure filling oil cup is used for filling lubricating oil, and the lubricating oil enters a gap between the guide sleeve and the ejector rod along the first oil hole and the second oil hole after filling, so that the ejector rod can slide in a reciprocating manner, and the ejector rod can slide in a reciprocating manner more smoothly.

Preferably, as an improvement, the end of the guide sleeve is provided with a seal. The sealing element is used for sealing the end part of the guide sleeve and preventing liquid in the hydraulic end from entering the pneumatic circulating valve.

Preferably, as an improvement, the lateral wall of gas accuse valve seat is equipped with the sealing washer. The sealing ring is used for sealing a gap between the pneumatic control valve seat and the mounting hole of the hydraulic end, and liquid in the hydraulic end is prevented from leaking through the gap between the pneumatic control valve seat and the mounting hole.

Drawings

Fig. 1 is a schematic structural diagram of a pneumatic circulation valve circulating in a reciprocating pump.

Fig. 2 is a schematic diagram of the fluid end of the reciprocating pump.

FIG. 3 is a left side cross-sectional schematic view of the hydraulic end of the reciprocating pump, primarily illustrating the cone valve within the hydraulic end.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the hydraulic pressure control valve comprises a hydraulic end 1, an outlet 2, an inlet 3, a pneumatic circulating valve 4, a valve core 5, a spring 6, a limiting sleeve 7, a third channel 8, a first channel 9, a guide sleeve 10, a sealing element 11, a pressing plate 12, a bolt 13, a connecting pipe 14, a piston rod 15, an air cylinder 16, an ejector rod 17, a pressure filling oil cup 18, a connecting part 19, an air control valve seat 20, a sealing ring 21 and a first oil hole 22.

The embodiment is basically as shown in the attached figure 1: the utility model provides a reciprocating pump inner loop pneumatic cycle valve, includes valve body and cylinder 16, and the valve body includes clamp plate 12 and takeover 14, and the top of takeover 14 and clamp plate 12 pass through bolt 13 detachable connection, and cylinder 16 passes through the bolt and installs on the bottom of takeover 14. The vertical sliding connection has ejector pin 17 on the clamp plate 12 at valve body top, and specific slip mode is: the pressing plate 12 is provided with a vertical sliding hole, and the ejector rod 17 is vertically positioned in the sliding hole. The top of ejector rod 17 is located the outside of valve body, and the bottom of ejector rod 17 is located the inside of valve body, and the tip of the piston rod 15 of cylinder 16 is located the inside of valve body, and the one end that ejector rod 17 is located the inside of valve body is connecting portion 19, and connecting portion 19 and the tip threaded connection of piston rod 15 are in the same place.

The top of clamp plate 12 is installed the gas accuse disk seat 20 of "protruding" font through the screw, is equipped with the holding tank between the top of clamp plate 12 and the bottom of gas accuse disk seat 20, installs vertical uide bushing 10 in the holding tank, ejector pin 17 sliding connection is in uide bushing 10. The left end of the pressing plate 12 is connected with a pressure filling oil cup 18, the pressing plate 12 is provided with a transverse first oil hole 22, the first oil hole 22 is communicated with the pressure filling oil cup 18, the side surface of the guide sleeve 10 is provided with a transverse second oil hole, and the first oil hole 22 is communicated with the second oil hole. Sealing elements 11 are arranged at two end parts of the guide sleeve 10, the sealing elements 11 are sealing rings, the sealing element 11 at the top of the guide sleeve 10 is positioned between the top end of the guide sleeve 10 and the top of the air control valve seat 20, and the sealing element 11 at the bottom of the guide sleeve 10 is positioned between the bottom of the pressure plate 12 and the bottom of the guide sleeve 10. The outer side wall of the pneumatic control valve seat 20 is provided with an annular groove, and a sealing ring 21 is arranged in the annular groove.

With reference to fig. 2-3, the use of the pneumatic circulation valve is described through a related structure of the hydraulic end, the hydraulic end 1 is provided with an inlet 3 and an outlet 2, the inlet 3 is located below the outlet 2, the inlet 3 and the outlet 2 are located on the same side of the hydraulic end 1, the hydraulic end 1 is provided with three groups of pneumatic circulation valves 4, the pneumatic circulation valves 4 are all mounted below the hydraulic end 1 through bolts, the hydraulic end 1 is provided with three groups of channels, the three groups of channels all include a first channel 9, a second channel and a third channel 8, and the three groups of channels are respectively opposite to the three pneumatic circulation valves 4. Referring to fig. 2, the first channel 9 and the third channel 8 are both arranged in a transverse direction, the first channel 9 is located at the bottom of the fluid end 1, the third channel 8 is located at the side of the fluid end 1, the center line of the third channel 8 is perpendicular to the center line of the first channel 9, the second channel is arranged vertically, the second channel is located above the first channel 9, the second channel is located at the right side of the third channel 8, and the first channel 9, the second channel and the third channel 8 are sequentially communicated. The first channel 9 is communicated with the inlet 3, the third channel 8 is communicated with the inlet 3 through a pipeline, and the end part of the first channel 9 far away from the inlet 3 is directly or indirectly communicated with the outlet 2; and a valve core 5 for controlling whether the second channel is communicated with the third channel 8 or not is vertically and slidably connected in the second channel. The valve element 5 in this embodiment is a cone valve. In the second channel in this embodiment, a valve core seat located below the valve core 5 is installed through a screw, and a sealing ring is connected between the valve core seat and the inner wall of the second channel. A limiting sleeve 7 is arranged above the valve core 5, the limiting sleeve 7 is installed in the second channel through a screw, a spring 6 is connected between the limiting sleeve 7 and the valve core 5, and the spring 6 in the embodiment is a pressure spring. The valve core 5 is pressed on the valve core seat under the action of the elastic force of the spring 6. The bottom of the hydraulic end 1 is provided with a vertical mounting hole which is communicated with the first channel 9.

The specific implementation process is as follows: the pneumatic circulation valve 4 is installed on the bottom of the hydraulic end 1 of the pump, the pneumatic control valve seat 20 is inserted into the installation hole, and the liquid enters the hydraulic end 1 through the inlet 3. The cylinder 16 drives the ejector rod 17 to move downwards through the piston rod 15, the ejector rod 17 does not push the valve core 5 upwards any more, the valve core 5 moves downwards under the pressure of the spring 6 and is pressed on the valve core seat below the valve core 5, at the moment, the valve core 5 blocks the third channel 8 and the second channel on the hydraulic end, and the valve core 5 is in a closed state at the moment. Liquid entering from the inlet 3 flows out of the outlet 2 along the first channel 9 so that high pressure liquid flows out at the outlet 2 of the pump.

When high-pressure liquid does not need to flow out from the outlet 2 of the pump, the cylinder 16 drives the ejector rod 17 to move upwards through the piston rod 15, the ejector rod 17 pushes the valve core 5 upwards, the valve core 5 overcomes the elastic force of the spring 6 to move upwards, a gap is formed between the valve core 5 and the valve core seat, the valve core 5 is opened, the second channel and the third channel 8 are in a communicated state, so that the liquid entering from the inlet 3 enters the first channel 9, the liquid enters the second channel and flows out from the third channel 8, and the third channel 8 is communicated with the inlet 3, so that the liquid flowing out from the third channel 8 flows back to the inlet 3 of the hydraulic end 1, and high hydraulic pressure cannot be established in the hydraulic end 1, and no high-pressure liquid flows out from the outlet 2 of the hydraulic end 1.

The foregoing is merely an example of the present invention and common general knowledge in the art of designing and/or characterizing particular aspects and/or features is not described in any greater detail herein. It should be noted that, for those skilled in the art, without departing from the technical solution of the present invention, several variations and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be defined by the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims (6)

1. The utility model provides a reciprocating pump inner loop pneumatic cycle valve which characterized in that: including valve body and cylinder, the cylinder is installed on the valve body, sliding connection has the ejector pin on the valve body, the one end of ejector pin is located the outside of valve body, and the other end of ejector pin is located the inside of valve body, the tip of the piston rod of cylinder is located the inside of valve body, and the ejector pin is located the inside one end of valve body and the end connection of piston rod together.

2. The reciprocating pump internal circulation pneumatic circulation valve of claim 1, wherein: the valve body comprises a pressing plate and a connecting pipe, one end of the connecting pipe is detachably connected with the pressing plate, and the ejector rod is connected to the pressing plate in a sliding mode.

3. The reciprocating pump internal circulation pneumatic circulation valve of claim 2, wherein: the side face, far away from the connecting pipe, of the pressing plate is provided with a pneumatic control valve seat, a guide sleeve is arranged between the pneumatic control valve seat and the pressing plate, and the ejector rod is connected in the guide sleeve in a sliding mode.

4. A reciprocating pump internal circulation pneumatic circulation valve according to claim 3, wherein: the pressing plate is connected with a pressure filling oil cup, the pressing plate is provided with a first oil hole, the first oil hole is communicated with the pressure filling oil cup, the side face of the guide sleeve is provided with a second oil hole, and the first oil hole is communicated with the second oil hole.

5. A reciprocating pump internal circulation pneumatic circulation valve according to claim 3, wherein: and a sealing piece is arranged at the end part of the guide sleeve.

6. A reciprocating pump internal circulation pneumatic circulation valve according to claim 3, wherein: and a sealing ring is arranged on the outer side wall of the pneumatic control valve seat.

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