CN207960863U - For the hydraulic-driven reciprocating pump in fresh water cooled dust pelletizing system - Google Patents

Abstract

The utility model provides a hydraulically driven reciprocating water pump used in a fresh water cooling and dust removal system, which comprises a water pump shell and a reversing valve. The reversing valve is provided with an oil inlet, an oil return port and two working ports. The water pump The casing is provided with a water inlet and a water outlet, and the reversing valve is provided with a reversing mechanism for switching the position of the spool. Water chamber; the oil chamber is provided with an oil piston, and the water pistons rigidly connected with the oil piston are respectively arranged in the two water chambers; the two working ports are respectively connected with the oil chambers on both sides of the oil piston; the two water chambers are respectively The first one-way valve connected to the water outlet is provided, and the second one-way valve connected to the water inlet is respectively arranged on the two water chambers. The reciprocating water pump is driven by oil pressure, and the hydraulic impact of the pumped water is small, and the water flow The water pump is stable, and the water pump can automatically reverse direction, the control is simple, the manufacturing and maintenance costs are low, and the operation is simple and reliable.

Description

Hydraulically driven reciprocating water pumps used in fresh water cooling and dedusting systems

technical field

The utility model relates to the field of cooling and dust removal, in particular to a hydraulically driven reciprocating water pump used in a fresh water cooling and dust removal system.

Background technique

With the development of water systems in various fields such as dust removal, cooling, fire extinguishing, and seawater desalination, the development of water pumps, the power source in water systems, is becoming more and more diverse. There are axial piston pumps and reciprocating water pumps that can meet higher pressure requirements: axial piston pumps can provide higher pressure, and the pulsation impact is smaller, but axial piston pumps have more parts and higher coordination requirements , the processing is relatively difficult, the cost is relatively expensive, and the plunger pump has high requirements on the medium and poor anti-pollution ability; the reciprocating water pump has the advantages of high pumping pressure, good suction performance, high efficiency, and adaptable to a wide range of conveying media. The commonly used reciprocating water pump in the form of a motor-driven crankshaft and connecting rod is frequently reversed during work, and the resulting hydraulic shock is relatively large, and the reverse is troublesome.

Utility model content

The technical problem to be solved by the utility model is: when the crankshaft connecting rod mechanism in the existing reciprocating water pump is driven, the hydraulic impact is relatively large, the reversing is troublesome and the service life of the reversing mechanism is short. The hydraulically driven reciprocating water pump in the system solves the above problems.

The technical solution adopted by the utility model to solve the technical problem is: a hydraulically driven reciprocating water pump used in the fresh water cooling and dust removal system, including a water pump housing and a reversing valve, and the reversing valve is provided with an oil inlet , an oil return port and two working ports, the oil return port is connected to the oil tank, the water pump housing is provided with a water inlet and a water outlet, and the reversing valve is provided with a reversing mechanism for switching the position of the spool, The inner chamber of the water pump housing is divided into an oil chamber and two water chambers respectively arranged on the left and right sides of the oil chamber; an oil piston is arranged in the oil chamber, and an oil piston is arranged in the two water chambers respectively There is a water piston rigidly connected to the oil piston; the two working ports communicate with the oil chambers on both sides of the oil piston respectively; the two water chambers are respectively provided with first One-way valve, the first one-way valve conducts in one direction from the water chamber to the water outlet; the two water chambers are respectively provided with second one-way valves communicating with the water inlet, so The second one-way valve conducts in one direction from the water inlet to the water chamber.

Further: the reversing valve is a two-position four-way reversing valve, the reversing mechanism includes a stroke switch valve, the area of the left end of the spool of the reversing valve is larger than the area of the right end, and the area of the spool of the reversing valve is left There is a left control port on the side, and a right control port is provided on the right side of the spool of the reversing valve; the oil inlet communicates with the right control port; the stroke switch valve is set between the left control port and the between the right control ports; when the stroke switch valve is in the conduction state, the left control port and the right control port are connected; when the stroke switch valve is in the disconnected state, the left control port and the Fuel tank connected.

Further: the stroke switch valve includes a bushing, the left side of the bushing communicates with the oil tank, the right side of the bushing communicates with the oil inlet, and the oil piston is provided with a valve that communicates with the left control port. The oil passage hole, the oil piston and the bushing are in sealing fit and the oil piston moves left and right in the bush. When the oil piston is at the left limit position, the oil passage hole communicates with the The left side of the bushing and the oil tank; when the oil piston is at the right limit position, the oil passage hole communicates with the right side of the bushing and the oil inlet.

Further: a throttle valve is arranged between the left control port and the stroke switch valve.

Further: a pressure gauge is provided at the water outlet.

The beneficial effect of the utility model is that the hydraulically driven reciprocating water pump used in the fresh water cooling and dedusting system of the utility model works through the oil pressure driven reciprocating water pump, the hydraulic impact of the pumped water flow is small, the water flow is stable, and the water pump can be automatically replaced. Direction, simple control, low manufacturing and maintenance costs, simple and reliable operation.

Description of drawings

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

Fig. 1 is a schematic diagram of the hydraulic system of the hydraulic drive reciprocating water pump used in the fresh water cooling and dedusting system of the present invention.

Fig. 2 is a schematic diagram of the principle of the water pump housing;

Figure 3 is a schematic diagram of the principle of the reversing valve,

Fig. 4 is a schematic diagram of the principle of the stroke switch valve.

In the figure 1. Water pump housing, 2. Reversing valve, 3. Oil inlet, 4. Oil return port, 5. Water inlet, 6. Water outlet, 7. Oil chamber, 8. Water chamber, 9. Oil piston , 10, water piston, 11, first one-way valve, 12, second one-way valve, 13, stroke switch valve, 14, right control port, 15, left control port, 16, working port, 17, oil tank, 18 , Throttle valve, 19, pressure gauge, 20, bushing.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present utility model, but should not be construed as limiting the present utility model. On the contrary, the embodiments of the present invention include all changes, modifications and equivalents falling within the spirit and scope of the appended claims.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Axial", "Radial", "Circumferential" The orientation or positional relationship indicated by etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, use a specific Azimuth configuration and operation, therefore, should not be construed as limiting the invention.

In addition, the terms "first", "second", etc. are used for descriptive purposes only, and should not be construed as indicating or implying relative importance. In the description of the present utility model, it should be noted that unless otherwise specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, or Integratively connected; it can be mechanically or electrically connected; it can be directly connected or indirectly connected through an intermediary. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model in specific situations. In addition, in the description of the present utility model, unless otherwise specified, "plurality" means two or more.

As shown in Figure 1, Figure 2 and Figure 3, the utility model provides a hydraulically driven reciprocating water pump used in a fresh water cooling and dust removal system, including a water pump housing 1 and a reversing valve 2, and the reversing valve 2 is set There are oil inlet 3, oil return port 4 and two working ports 16, the oil return port 4 is connected to the oil tank 17, the water pump housing 1 is provided with a water inlet 5 and a water outlet 6, and the reversing valve 2 is provided with a switching spool The reversing mechanism of the station, the inner chamber of the water pump housing 1 is divided into an oil chamber 7 and two water chambers 8 respectively arranged on the left and right sides of the oil chamber 7; The water chamber 8 is respectively provided with a water piston 10 rigidly connected to the oil piston 9; two working ports 16 communicate with the oil chamber 7 on both sides of the oil piston 9;

The two water chambers 8 are respectively provided with the first one-way valve 11 communicated with the water outlet 6, and the first one-way valve 11 is unidirectionally conducted from the water chamber 8 to the water outlet 6; the two water chambers 8 are respectively provided with The second one-way valve 12 communicated with the water inlet 5, and the second one-way valve 12 is unidirectionally connected from the water inlet 5 to the water chamber 8.

When starting to work, the oil piston 9 is located at the left end of the oil chamber 7. At this time, the hydraulic oil with pressure at the oil inlet 3 flows into the oil chamber 7 on the left side of the oil piston 9 through the reversing valve 2 to push the oil piston 9 and the water piston. 10 move to the right together, at this time the water chamber 8 on the left absorbs water from the water inlet 5, and the water chamber 8 on the right drains water to the water outlet 6; when the oil piston 9 moves to the right limit position, the reversing mechanism works , the spool of the reversing valve 2 is switched, and the hydraulic oil at the oil inlet 3 flows into the oil chamber 7 on the right side of the oil piston 9 through the reversing valve 2, and pushes the oil piston 9 and the water piston 10 to the left together, and the oil The hydraulic oil in the oil chamber 7 on the left side of the piston 9 flows back to the oil tank 17. At this time, the water chamber 8 on the right side absorbs water from the water inlet 5, and the water chamber 8 on the left side drains water to the water outlet 6; when the oil piston 9 moves When reaching the left limit position, the reversing mechanism works again, the spool of reversing valve 2 is switched again, the hydraulic oil at the oil inlet 3 flows into the oil chamber 7 on the left side of the oil piston 9 through the reversing valve 2, and The oil piston 9 and the water piston 10 are pushed to the right together, and the hydraulic oil in the oil chamber 7 on the right side of the oil piston 9 flows back to the oil tank 17; the hydraulic oil is continuously switched through the reversing valve 2, and the oil piston 9 and the water piston are pushed 10 moves back and forth in the water pump housing 1 to achieve the effect of pumping the water from the water inlet 5 out of the water outlet 6 .

The reversing valve 2 is a two-position, four-way reversing valve. The reversing mechanism includes a stroke switch valve 13. The area of the left end of the spool of the reversing valve 2 is larger than that of the right end. The left side of the spool of the reversing valve 2 is provided with a left control port 15 , the right side of the spool of the reversing valve 2 is provided with a right control port 14; the oil inlet 3 communicates with the right control port 14; the stroke switch valve 13 is arranged between the left control port 15 and the right control port 14; when the stroke switch valve When 13 is in the conduction state, the left control port 15 is connected with the right control port 14; when the stroke switch valve 13 is in the disconnected state, the left control port 15 is connected with the fuel tank 17.

As shown in Figure 4, the stroke switch valve 13 includes a bushing 20, the left side of the bushing 20 communicates with the oil tank 17, the right side of the bushing 20 communicates with the oil inlet 3, and the oil piston 9 There is an oil passage hole communicating with the left control port 15, the oil piston 9 and the bushing 20 are in clearance sealing fit and the oil piston 9 moves left and right in the bushing 20, when the oil When the piston 9 is at the left limit position, the oil passage hole communicates with the left side of the bushing 20 and the oil tank 17; when the oil piston 9 is at the right limit position, the oil passage hole communicates with the bushing 20 on the right side and the oil inlet 3.

When the stroke switch valve 13 is in the disconnected state, the left control port 15 is connected to the oil tank 17, and the right control port 14 is connected to the oil inlet 3 to have pressure. It is introduced into the oil chamber 7 on the left side of the oil piston 9 and pushes the oil piston 9 to move to the right. When the oil piston 9 moves to the right limit position, the stroke switch valve 13 is switched, and the left control port 15 and the right control port 14 are connected. At this time, the pressure of the left control port 15 is the same as that of the right control port 14. Since the area of the left end of the spool of the reversing valve 2 is larger than the area of the right end, the spool of the reversing valve 2 will be pushed to move to the right, and the spool of the reversing valve 2 will switch. To the left position, the hydraulic oil is introduced into the oil chamber 7 on the right side of the oil piston 9 and pushes the oil piston 9 to move to the left. When the oil piston 9 moves to the left to the limit position, the stroke switch valve 13 is switched again to repeat the above work cycle.

This hydraulic reversing mechanism has a simple structure and a high degree of system integration. The switching control of the spool function is simple. The reversing operation can be completed by using the pressure oil at the oil inlet 3, and there is no need to add too many reversing parts and equipment. The failure rate is low and the manufacturing cost is low.

A throttle valve 18 is arranged between the left control port 15 and the stroke switch valve 13. When the stroke switch valve 13 is switched from the disconnected state to the conduction state, the left control port 15 will flow into the pressure oil, and the throttle valve 18 can Avoiding the pressure pulsation impact of the hydraulic oil at the oil inlet 3 can make the spool switching of the reversing valve 2 more stable, avoid the vibration of the oil piston 9 caused by the reversing, and make the water flow at the water outlet 6 more stable. Increased equipment life. The 6 water outlets are provided with a pressure gauge 19, through which the operator can know the pressure of the water flow at the 6 water outlets in real time, which facilitates the operation of the operator.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structures, materials or features are included in at least one embodiment or example of the present invention. In this specification, schematic representations of the terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Inspired by the above ideal embodiment according to the utility model, through the above description content, relevant staff can completely make various changes and modifications within the scope of not deviating from the technical idea of the utility model. The technical scope of this utility model is not limited to the content in the description, but must be determined according to the scope of the claims.

Claims (5)

1. a kind of hydraulic-driven reciprocating pump in fresh water cooled dust pelletizing system, including water pump cover（1）And reversal valve （2）, the reversal valve（2）On be provided with oil inlet（3）, oil return opening（4）With two working holes（16）, the oil return opening（4）Even Logical fuel tank（17）, the water pump cover（1）On be provided with water inlet（5）And water outlet（6）, the reversal valve（2）On be provided with Switch the changement of spool station, it is characterised in that：

The water pump cover（1）Inner cavity be separated into an oil pocket（7）It is separately positioned on the oil pocket with two（7）The left and right sides Water cavity（8）；The oil pocket（7）In be provided with oily piston（9）, in two water cavities（8）In be respectively arranged with and the oil Piston（9）Rigidly connected water piston（10）；Two working holes（16）Respectively with the oily piston（9）The oil pocket of both sides （7）Connection；

Two water cavities（8）On be respectively arranged with and the water outlet（6）First check valve of connection（11）, described first is single To valve（11）By the water cavity（8）To the water outlet（6）Direction one-way conduction；Two water cavities（8）On be respectively arranged with With the water inlet（5）Second check valve of connection（12）, second check valve（12）By the water inlet（5）To the water Chamber（8）Direction one-way conduction.

2. as described in claim 1 for the hydraulic-driven reciprocating pump in fresh water cooled dust pelletizing system, it is characterised in that： The reversal valve（2）For two-position four way change valve, the changement includes travel switch valve（13）, the reversal valve（2）'s Spool left end area is more than right end area, the reversal valve（2）Spool on the left of be equipped with left control mouth（15）, the reversal valve （2）Spool on the right side of be equipped with right control mouth（14）；The oil inlet（3）With the right control mouth（14）Connection；The stroke is opened Close valve（13）It is arranged in the left control mouth（15）With the right control mouth（14）Between；When the travel switch valve（13）It is in When conducting state, the left control mouth（15）With the right control mouth（14）Connection；When the travel switch valve（13）In disconnected When open state, the left control mouth（15）And fuel tank（17）Connection.

3. as claimed in claim 2 for the hydraulic-driven reciprocating pump in fresh water cooled dust pelletizing system, it is characterised in that： The travel switch valve（13）Including bushing（20）, the bushing（20）Left side and fuel tank（17）Connection, the bushing（20） Right side and oil inlet（3）It communicates, the oily piston（9）It is equipped with and the left control mouth（15）The oil hole communicated, it is described Oily piston（9）With the bushing（20）Clearance seal coordinates and the oily piston（9）In the bushing（20）Interior side-to-side movement, When the oily piston（9）At limit on the left position, the oil hole is connected to the bushing（20）Left side and the fuel tank（17）； When the oily piston（9）At limit on the right-right-hand limit position, the oil hole is connected to the bushing（20）Right side and the oil inlet （3）.

4. as claimed in claim 3 for the hydraulic-driven reciprocating pump in fresh water cooled dust pelletizing system, it is characterised in that： The left control mouth（15）With the travel switch valve（13）Between be provided with throttle valve（18）.

5. as claimed in claim 4 for the hydraulic-driven reciprocating pump in fresh water cooled dust pelletizing system, it is characterised in that： The water outlet（6）Place is provided with pressure gauge（19）.