Flow divider valve structure of gear pump

Abstract

The utility model discloses a diverter valve structure of a gear pump, relates to the field of gear pumps, and aims to solve the problems that in the prior art, most of existing diverter valves achieve diverting in a rotating mode, but when the gear pump works, the pressure is large, and when high-pressure liquid passes through the rotating diverter valve, large rotating resistance can be generated, so that energy consumption is increased, and cost is reduced. And the service life of the diverter valve is also influenced. A flow dividing valve assembly is connected to one side of the gear pump, a flow dividing channel is formed in the middle of the interior of the flow dividing valve assembly, connecting cavities are formed in the positions, at the upper end and the lower end of the flow dividing channel, of the interior of the flow dividing valve assembly, circular movable parts are arranged in the two connecting cavities correspondingly, and conical plugging columns are fixedly connected to the circular movable parts correspondingly. The upper end and the lower end of one side of the flow dividing valve assembly are fixedly connected with flow dividing pipes.

Description

TECHNICAL FIELD

[0001] The utility model relates to gear pump field, concretely is a gear pump shunt valve structure. BACKGROUND

[0002] Gear pump is a kind of rotary pump that relies on the change and movement of the working volume formed between pump cylinder and meshing gear to transport liquid or make it pressurized.Gear pump is composed of two gears, pump body, front and rear end covers and transmission shaft, etc.When the gear rotates, the space volume on the gear disengagement side gradually increases, forming a vacuum, and liquid is sucked in;The space volume on the gear meshing side gradually decreases, and the liquid is extruded and transported to the pipeline.The suction chamber and the discharge chamber are separated by the meshing line of the two gears.Gear pump has the characteristics of simple structure, reliable operation, strong self-priming ability, etc., but the efficiency is relatively low, the noise and vibration are large, and it is easy to wear.

[0003] For example, the authorized announcement number CN211258992U discloses a gear pump, comprising a transmission shaft, a bearing oil seal, a flange front cover, a front pump cover, a pump body and a rear pump cover, the bearing oil seal is sleeved on the transmission shaft and located between the front pump cover and the flange front cover, wherein, the transmission shaft is provided with an inner oil leakage hole;The front pump cover is provided with an oil leakage groove communicated with the inner oil leakage hole;The rear pump cover is provided with an outer oil leakage hole extending along the radial direction thereof;The oil leakage groove, the inner oil leakage hole and the outer oil leakage hole form a passage for circulating flow of hydraulic oil outward.The gear pump of the utility model can quickly dissipate the heat generated during the operation of the gear pump, reduce the temperature of the pump body, improve the working performance of the gear pump and prolong the service life of the gear pump.

[0004] The existing shunt valve is mostly realized by rotating, but the pressure is large when the gear pump works, and the high-pressure liquid will generate large rotating resistance when passing through the rotating shunt valve, which not only increases the energy consumption, but also affects the service life of the shunt valve;Therefore, there is an urgent need to develop a gear pump shunt valve structure to help people solve the existing problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a gear pump shunt valve structure to solve the problem that the existing shunt valve is mostly realized by rotating, but the pressure is large when the gear pump works, and the high-pressure liquid will generate large rotating resistance when passing through the rotating shunt valve, which not only increases the energy consumption, but also affects the service life of the shunt valve.

[0006] To achieve the above object, the utility model provides the following technical scheme: a gear pump shunt valve structure, including gear pump, gear pump one side is connected with shunt valve subassembly, the middle part of shunt valve subassembly inside is provided with shunt channel, shunt valve subassembly inside and on the upper and lower ends of shunt channel are provided with connecting cavity, two The inside of connecting cavity is provided with round movable part, the conical plug of round movable part is fixedly connected, shunt valve subassembly one side upper and lower ends are fixedly connected with shunt pipe.

[0007] Preferably, the middle part of the gear pump is fixedly connected with an output pipe, the output pipe is fixedly connected with a first connecting plate on one side, the middle part of the shunt valve assembly is fixedly connected with a connecting pipe on one side, and the connecting pipe is fixedly connected with a second connecting plate on one side.

[0008] Preferably, the second connecting plate and the second connecting plate are fixedly connected by a plurality of bolts, and a sealing ring is arranged between the second connecting plate and the second connecting plate.

[0009] Preferably, the connecting pipe is in communication with the shunt channel inside the shunt valve assembly, and the upper and lower ends of the shunt channel are respectively in communication with the interiors of the two connecting cavities.

[0010] Preferably, the middle part of the two round movable parts is fixedly connected with a linkage rod, and the linkage rod passes through the interior of the shunt channel.

[0011] Preferably, the upper end of the shunt valve assembly is fixedly connected with a hydraulic rod, and the upper end of the linkage rod extends out of the upper end surface of the shunt valve assembly and is fixedly connected with the movable end of the hydraulic rod.

[0012] Preferably, the conical plug of the round movable part inside the connecting cavity at the upper end is inserted into the interior of the shunt channel at the upper end.

[0013] Compared with the prior art, the utility model has the advantages that:

[0014] (1) In the utility model, the non-rotary shunt control of the shunt valve is realized by driving the linkage rod and the round movable part with the hydraulic rod, the large rotary resistance generated when the high-pressure liquid passes through the rotary shunt valve is effectively avoided, the energy consumption is reduced, and the service life of the shunt valve is prolonged.

[0015] (2) In the utility model, the extension amount of the hydraulic rod can be accurately controlled, the flow distribution of the two shunt pipes can be flexibly adjusted, the accurate shunt and flow direction conversion of the liquid are realized, and the overall performance and reliability of the gear pump shunt valve structure are improved.

[0016] (3) The utility model discloses, the connecting portion of shunt valve subassembly and gear pump adopts the mode of bolt fixed connection and is provided with sealing ring, guarantees the leakproofness and stability of connecting place, and simultaneously, the independent overhaul and maintenance of gear pump and shunt valve subassembly are convenient, improve the maintainability and use efficiency of equipment. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a front view of the gear pump shunt valve structure of the utility model;

[0018] Figure 2 It is a front view of the gear pump shunt valve structure of the utility model;

[0019] Figure 3 It is a front view of the gear pump shunt valve structure of the utility model;

[0020] Figure 4 It is a front view of the gear pump shunt valve structure of the utility model;

[0021] In the drawing: 1, gear pump;101, output pipe;102, first connecting plate;2, shunt valve subassembly;201, shunt channel;202, connecting cavity;203, shunt pipe;3, connecting pipe;301, second connecting plate;302, sealing ring;303, bolt;4, round movable part;401, conical plug column;402, linkage rod;5, hydraulic rod. DETAILED DESCRIPTION

[0022] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0023] Please refer to Figures 1-4 The utility model provides an embodiment: a gear pump shunt valve structure, including gear pump 1, gear pump 1 one side is connected with shunt valve subassembly 2, and gear pump 1 one side middle part is fixedly connected with output pipe 101, and output pipe 101 one side is fixedly connected with first connecting plate 102, and shunt valve subassembly 2 one side middle part is fixedly connected with connecting pipe 3, and connecting pipe 3 one side is fixedly connected with second connecting plate 301, and second connecting plate 301 and second connecting plate 301 are fixedly connected through a plurality of bolts 303, and second connecting plate 301 and second connecting plate 301 are provided with sealing ring 302, and output pipe 101 and connecting pipe 3 are internally communicated, and can make gear pump 1 and shunt valve subassembly 2 separate through the dismounting bolt 303, and the independent overhaul and maintenance of gear pump 1 and shunt valve subassembly 2 are convenient.

[0024] Please refer to Figures 2-3The middle part of the shunt valve assembly 2 is provided with a shunt channel 201, and the upper and lower ends of the shunt valve assembly 2 are provided with connecting cavities 202. The two connecting cavities 202 are provided with circular movable parts 4, and the circular movable parts 4 are fixedly connected with conical plugs 401. The lower end of the conical plug 401 of the circular movable part 4 in the upper end connecting cavity 202 is inserted into the upper end of the shunt channel 201. The upper and lower ends of one side of the shunt valve assembly 2 are fixedly connected with shunt pipes 203. One side of the connecting pipe 3 is in communication with the shunt channel 201 in the shunt valve assembly 2. The upper and lower ends of the shunt channel 201 are in communication with the interiors of the two connecting cavities 202 respectively. The two shunt pipes 203 are in communication with the interiors of the two connecting cavities 202 in the shunt valve assembly 2 respectively. The upper end of the shunt channel 201 is blocked by the lower end conical plug 401 of the upper end circular movable part 4, so that the liquid flows downward through the lower end connecting cavity 202 and then flows out from the lower end shunt pipe 203. The two circular movable parts 4 are fixedly connected with a linkage rod 402. The linkage rod 402 passes through the interior of the shunt channel 201. The shunt valve assembly 2 is fixedly connected with a hydraulic rod 5. The upper end of the linkage rod 402 extends out of the upper end surface of the shunt valve assembly 2 and is fixedly connected with the movable end of the hydraulic rod 5. When it is necessary to switch the liquid flow direction, the linkage rod 402 is lifted by the hydraulic rod 5, so that the two circular movable parts 4 are lifted synchronously. When the upper end circular movable part 4 is lifted, the lower end conical plug 401 is separated from the upper end of the shunt channel 201, so that the upper end of the shunt channel 201 is connected with the upper end connecting cavity 202 of the shunt valve assembly 2, and then the liquid can flow out from the upper end shunt pipe 203. At this time, the liquid flows out from the two shunt pipes 203. By controlling the lifting distance of the two circular movable parts 4, the flow amount of the liquid flowing to the two shunt pipes 203 can be adjusted. When the upper end conical plug 401 of the lower end circular movable part 4 is inserted into the lower end of the shunt channel 201 to realize blocking, the liquid completely flows out from the upper end shunt pipe 203, and the liquid flow direction is switched.

[0025] Working principle: when the gear pump 1 is started and works, high-pressure liquid flows out from the output pipe 101 of the gear pump 1, enters the shunt valve assembly 2 through the closely connected connecting pipe 3. In the shunt valve assembly 2, the liquid first enters the shunt channel 201. At this time, due to the initial state of the hydraulic rod 5, the linkage rod 402 and the two circular movable parts 4 thereon are in the low position. The conical plug 401 of the upper end circular movable part 4 tightly blocks the upper end of the shunt channel 201, so that the liquid can only flow downward along the shunt channel 201 and enter the lower end shunt pipe 203 through the lower end connecting cavity 202, realizing the single flow direction output of the liquid.

[0026] When it is necessary to change the flow direction of the liquid or adjust the flow of the two shunt pipes 203, the hydraulic rod 5 starts to work, pushing the linkage rod 402 and the two circular movable pieces 4 on it to rise synchronously. As the conical plug column 401 of the upper end circular movable piece 4 gradually separates from the upper end of the shunt channel 201, the upper end of the shunt channel 201 is connected with the upper end connecting cavity 202, at this time, the high-pressure liquid can pass through the upper and lower connecting cavities 202 at the same time, and flow out from the upper and lower two shunt pipes 203 respectively. Since the structure avoids the problem of rotary resistance in the rotary shunt valve, the energy consumption can be significantly reduced, and the service life of the shunt valve is improved.

[0027] By accurately controlling the extension amount of the hydraulic rod 5, the flow distribution of the two shunt pipes 203 can be flexibly adjusted, realizing accurate shunting and flow direction conversion of the liquid. This design not only solves the limitations of the rotary shunt valve in high-pressure environment, but also improves the overall performance and reliability of the gear pump shunt valve structure.

[0028] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A gear pump split flow valve arrangement comprising a gear pump (1), characterized by: The gear pump (1) one side is connected with the shunt valve subassembly (2), the middle part of the shunt valve subassembly (2) is provided with shunt channel (201), the shunt valve subassembly (2) is provided with connecting cavity (202) inside and on the upper and lower ends of shunt channel (201), the circular movable element (4) is arranged in the connecting cavity (202) inside, the conical plug column (401) is fixedly connected to the circular movable element (4), the shunt pipe (203) is fixedly connected to the upper and lower ends of the shunt valve subassembly (2) one side.

2. A gear pump split flow valve structure according to claim 1, characterized in that: The gear pump (1) one side middle part is fixedly connected with the output pipe (101), the output pipe (101) one side is fixedly connected with the first connecting plate (102), the shunt valve subassembly (2) one side middle part is fixedly connected with the connecting pipe (3), the connecting pipe (3) one side is fixedly connected with the second connecting plate (301).

3. A gear pump split flow valve structure according to claim 2, characterized in that: The second connecting plate (301) and the second connecting plate (301) are fixedly connected through a plurality of bolts (303), the second connecting plate (301) and the second connecting plate (301) are provided with sealing ring (302), the output pipe (101) and the connecting pipe (3) are communicated.

4. A gear pump split flow valve structure according to claim 2, characterized in that: The connecting pipe (3) one side and the shunt channel (201) inside the shunt valve subassembly (2) are communicated, the upper and lower ends of the shunt channel (201) are communicated with the inside of two connecting cavities (202) respectively, two shunt pipes (203) are communicated with the inside of two connecting cavities (202) in the shunt valve subassembly (2) respectively.

5. A gear pump split flow valve structure according to claim 1, characterized in that: The middle part of two circular movable elements (4) is fixedly connected with linkage rod (402), the linkage rod (402) passes through the inside of shunt channel (201).

6. A gear pump split flow valve structure according to claim 5, characterized in that: The upper end of the shunt valve subassembly (2) is fixedly connected with hydraulic rod (5), the upper end of the linkage rod (402) extends out of the upper end surface of the shunt valve subassembly (2) and is fixedly connected with the movable end of the hydraulic rod (5).

7. A gear pump split flow valve structure according to claim 1, characterized in that: The lower end conical plug column (401) of the circular movable element (4) in the connecting cavity (202) is inserted into the upper end of the shunt channel (201).

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