Energy-saving device for three-cylinder plunger pump

Abstract

The utility model provides an energy-saving device for a three-cylinder plunger pump, and belongs to the technical field of three-cylinder plunger pumps. The device comprises a pump body and a crankshaft box body which are in sealed connection, and a crankshaft is arranged in the crankshaft box body, and is characterized in that a pressure regulating valve, an air chamber and a pressure gauge are arranged on the pump body, a spray switch and an air inlet switch are arranged at the front end of the pump body, a water inlet pipe is arranged below the air inlet switch, and an overflow sleeve is arranged between the pressure regulating valve and the pump body; the side wall of the overflow sleeve is provided with an overflow connector, one side of the crankcase body is provided with an installation opening for the crankshaft to stretch out, an impeller is fixed to the end of the crankshaft, an impeller cover is connected to the installation opening in a sealed mode, the impeller is located in an impeller cavity formed in the impeller cover, and one side of the impeller cover is communicated with the overflow connector through a connecting pipe. And the other side of the impeller cover is connected with an overflow pipe communicated with the sealing cavity. The utility model has the advantages of providing larger power output, being reasonable in structure and reducing energy consumption.

Description

Technical Field

[0001] The utility model belongs to the technical field of triplex plunger pumps, in particular to an energy-saving device for triplex plunger pumps. Background Art

[0002] The plunger pump is an important device in the hydraulic system. It relies on the reciprocating motion of the plunger in the cylinder to change the volume of the sealed working chamber to achieve oil suction and oil pressure. It has the advantages of high rated pressure, compact structure, high efficiency and convenient flow regulation. It is widely used in high pressure, large flow and flow regulation occasions, such as hydraulic presses, engineering machinery and ships. Among them, the three-cylinder plunger pump is the most commonly used one.

[0003] In a three-cylinder plunger pump, a pressure regulating valve is usually provided to perform pressure regulating operations. During the pressure regulating process, water overflows from the pump body, and the overflow water usually flows into the water tank. This method ensures the conservation of water in the water tank, but it cannot fully utilize the water. Summary of the invention

[0004] The purpose of the utility model is to solve the problems existing in the prior art, thereby providing an energy-saving device for a three-cylinder plunger pump, which can provide a greater power output for the crankshaft on the basis of the original three-cylinder plunger pump, has a reasonable structure and reduces energy consumption.

[0005] The purpose of the utility model is achieved in this way:

[0006] A energy-saving device for a three-cylinder plunger pump, comprising a pump body and a crankcase body that are sealed and connected, and a crankshaft is arranged in the crankcase body, characterized in that a pressure regulating valve, an air chamber and a pressure gauge are arranged on the pump body, a spray switch and an air intake switch are arranged at the front end of the pump body, a water inlet pipe is arranged below the air intake switch, an overflow sleeve is arranged between the pressure regulating valve and the pump body, an overflow interface is arranged on the side wall of the overflow sleeve, a mounting opening for extending the crankshaft is arranged on one side of the crankcase body, and an impeller is fixed to the end of the crankshaft, an impeller cover is sealed and connected to the mounting opening, the impeller is located in an impeller cavity formed in the impeller cover, one side of the impeller cover is connected to the overflow interface through a connecting pipe, and the other side of the impeller cover is connected to an overflow pipe connected to the sealed cavity.

[0007] The utility model is further configured such that mounting parts are formed at both ends of the top of the overflow sleeve, screw holes corresponding to the mounting parts are formed on both sides of the lower end of the pressure regulating valve and the upper end of the pump body, and the lower end of the pressure regulating valve, the mounting part and the upper end of the pump body are fixedly connected by bolts.

[0008] The utility model is further configured that a pin hole is provided at the end of the crankshaft extending out of the mounting opening, and the impeller is fixed to the end of the crankshaft by means of a pin shaft.

[0009] The utility model is further configured that an oil seal is arranged in the installation opening, and one end of the crankshaft penetrates into the oil seal.

[0010] The utility model is further configured such that the impeller cover and the overflow interface are both formed with external threads, and the end of the connecting pipe and the end of the overflow pipe are both fixed to the impeller cover and the overflow interface by means of threads.

[0011] The utility model is further configured such that the overflow pipe is directed vertically downward.

[0012] Compared with the prior art, the utility model has the following outstanding and beneficial technical effects:

[0013] 1. The energy-saving device of the three-cylinder plunger pump provided by the utility model utilizes the overflow water generated at the lower end of the pressure regulating valve to flow through the connecting pipe to the end of the crankshaft connected to the impeller at one end, and the overflow water flow brings a certain power to the rotating crankshaft end, thereby reducing energy consumption when outputting greater power.

[0014] 2. The utility model further fixes the overflow sleeve by means of bolts penetrating the mounting portion, so that the overflow sleeve is firmly fixed between the pressure regulating valve and the pump body.

[0015] 3. In the utility model, the impeller is fixedly connected to the crankshaft by means of a pin shaft, so as to ensure that the impeller will not slip when the overflow water drives the impeller to rotate.

[0016] 4. In the utility model, external threads are formed on the impeller cover and the overflow interface, which facilitates the threaded connection of the connecting pipe and the overflow pipe.

[0017] 5. The utility model places the overflow pipe vertically downward, which effectively prevents overflow water from accumulating in the impeller cover and ensures long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model;

[0019] Figure 2 It is a partial exploded schematic diagram of the utility model;

[0020] Figure 3 It is the utility model;

[0021] Reference numerals:

[0022] 1- pump body; 10- spray switch; 11- air inlet switch; 12- water inlet pipe; 13- bolt;

[0023] 2-crankcase; 20-crankshaft; 21-installation port; 22-pin hole; 23-oil seal;

[0024] 3-pressure regulating valve; 4-air chamber; 40-pressure gauge; 5-overflow sleeve; 50-overflow interface; 51-installation part

[0025] 6-impeller; 7-impeller cover; 8-connecting pipe; 9-overflow pipe. DETAILED DESCRIPTION

[0026] The present invention will be further described below with reference to the accompanying drawings. Figure 1 —:

[0027] An energy-saving device for a three-cylinder plunger pump comprises a pump body 1 and a crankcase 2 which are sealed and connected, and a crankshaft 20 is arranged in the crankcase 2, a pressure regulating valve 3, an air chamber 4 and a pressure gauge 40 are arranged on the pump body 1, a spray switch 10 and an air intake switch 11 are arranged at the front end of the pump body 1, and a water inlet pipe 12 is arranged below the air intake switch 11, an overflow sleeve 5 is arranged between the pressure regulating valve 3 and the pump body 1, and an overflow interface 50 is opened on the side wall of the overflow sleeve 5, a mounting opening 21 for extending the crankshaft 20 is opened on one side of the crankcase 2, and an impeller 6 is fixed at the end of the crankshaft 20, an impeller cover 7 is sealed and connected to the mounting opening 21, the impeller 6 is located in an impeller cavity formed in the impeller cover 7, one side of the impeller cover 7 is connected to the overflow interface 50 through a connecting pipe 8, and the other side of the impeller cover 7 is connected to an overflow pipe 9 connected to the impeller cavity.

[0028] During the implementation, the overflow sleeve 5 is connected to the lower end of the pressure regulating valve 3, and the connecting pipe is connected to the overflow sleeve 5 and connected to the end of the crankshaft. Usually, one end of the crankshaft extends out of the pump body and is provided with a pulley for power output. In the above structure, the other end of the crankshaft also extends out of the pump body and is connected to the impeller and is provided with an impeller cover. The overflow water is injected from one side of the impeller cover to make the impeller generate a certain rotational force and then flow out from the other side of the impeller cover. In this way, the crankshaft of the traditional three-cylinder plunger pump is more energy-efficient when outputting, and it fully utilizes the effect of overflow water.

[0029] Preferably, mounting portions 51 are formed at both ends of the top of the overflow sleeve 5, and screw holes corresponding to the mounting portions 51 are formed on both sides of the lower end of the pressure regulating valve 3 and the upper end of the pump body 1, and the lower end of the pressure regulating valve 3, the mounting portion 51 and the upper end of the pump body 1 are fixedly connected by bolts 13.

[0030] In the above structure, the mounting portion 51 is similar to a flange, which is fixed by bolts so that it can be firmly fixed between the pump body and the pressure regulating valve to ensure normal use.

[0031] Preferably, a pin hole 22 is provided at the end of the crankshaft 20 extending out of the mounting opening 21, and the impeller 6 is fixed to the end of the crankshaft 20 by means of a pin shaft, thereby ensuring that the impeller can be firmly fixed to the end of the crankshaft.

[0032] Preferably, an oil seal 23 is provided in the installation opening 21, and one end of the crankshaft 20 penetrates into the oil seal 23 to ensure the sealing between the end of the crankshaft and the installation opening during rotation.

[0033] Preferably, the impeller cover 7 and the overflow interface 50 are both formed with external threads, and the end of the connecting pipe 8 and the end of the overflow pipe 9 are both fixed to the impeller cover 7 and the overflow interface 50 by means of threads.

[0034] In the above structure, the connecting pipe and the overflow pipe are connected by screwing, which provides convenience for operators during installation.

[0035] Preferably, the overflow pipe 9 is directed vertically downward. In order to prevent the accumulation of overflow water in the impeller cover, the overflow pipe 9 is arranged vertically downward to effectively discharge the overflow water, prevent the overflow water from entering the crankcase, and ensure normal use.

[0036] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An energy-saving device for a triplex plunger pump, comprising a pump body (1) and a crankcase (2) which are sealed and connected, wherein a crankshaft (20) is arranged in the crankcase (2), the pump body (1) is provided with a pressure regulating valve (3), an air chamber (4) and a pressure gauge (40), a spray switch (10) and an air intake switch (11) are arranged at the front end of the pump body (1), and a water intake pipe (12) is arranged below the air intake switch (11), characterized in that: An overflow sleeve (5) is provided between the pressure regulating valve (3) and the pump body (1), and an overflow interface (50) is provided on the side wall of the overflow sleeve (5). A mounting opening (21) for extending the crankshaft (20) is provided on one side of the crankcase (2), and an impeller (6) is fixed at the end of the crankshaft (20). An impeller cover (7) is sealedly connected to the mounting opening (21). The impeller (6) is located in an impeller cavity formed in the impeller cover (7). One side of the impeller cover (7) is connected to the overflow interface (50) via a connecting pipe (8), and the other side of the impeller cover (7) is connected to an overflow pipe (9) connected to the impeller cavity.

2. The energy-saving device for a triplex plunger pump according to claim 1, characterized in that: Mounting portions (51) are formed at both ends of the top of the overflow sleeve (5), and screw holes corresponding to the mounting portions (51) are formed on both sides of the lower end of the pressure regulating valve (3) and the upper end of the pump body (1), and the lower end of the pressure regulating valve (3), the mounting portion (51) and the upper end of the pump body (1) are fixedly connected by bolts (13).

3. An energy-saving device for a triplex plunger pump according to claim 1 or 2, characterized in that: The end of the crankshaft (20) extending out of the mounting opening (21) is provided with a pin hole (22), and the impeller (6) is fixed to the end of the crankshaft (20) by means of a pin shaft.

4. The energy-saving device for a triplex plunger pump according to claim 1, characterized in that: An oil seal (23) is arranged in the installation opening (21), and one end of the crankshaft (20) penetrates into the oil seal (23).

5. The energy-saving device for a triplex plunger pump according to claim 1, characterized in that: The impeller cover (7) and the overflow interface (50) are both formed with external threads, and the end of the connecting pipe (8) and the end of the overflow pipe (9) are both fixed to the impeller cover (7) and the overflow interface (50) by means of threads.

6. An energy-saving device for a triplex plunger pump according to claim 1 or 5, characterized in that: The overflow pipe (9) is directed vertically downward.

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