Miniature gear pump with protection function

Abstract

The utility model relates to the technical field of gear pumps, in particular to a miniature gear pump with a protection function, which comprises a pump body and further comprises a fixing frame fixedly mounted on one side of the pump body, a motor is arranged on one side of the fixing frame, an output shaft of the motor rotatably penetrates through the fixing frame and extends into the pump body, a threaded hole is arranged on one side of the pump body, and the threaded hole is communicated with the pump body. A threaded rod is installed in the threaded hole in a threaded mode, a pressure relief rod is fixedly installed at the end, close to the interior of the pump body, of the threaded rod, a reset spring is fixedly installed at the end, away from the threaded rod, of the pressure relief rod, and a pressure relief ball is arranged in the reset spring. The pressure relief hole is formed in one side of the pump body, the pressure relief rod is pulled out of the pressure relief hole by rotating the threaded rod, in this way, the pressure of the pump body can be relieved from the pressure relief hole, the pressure relief ball is arranged at one end of the pressure relief rod, the limiting plate is arranged at the other end of the pressure relief rod, and the pressure relief rod is convenient to install and use.

Description

Technical Field

[0001] The utility model relates to the technical field of gear pumps, in particular to a micro gear pump with a protective function. Background Art

[0002] The gear pump is a rotary pump that relies on the change and movement of the working volume formed between the pump cylinder and the meshing gears to transport liquid or increase its pressure. It consists of two closed spaces, two gears, a pump body, and front and rear covers. When the gears rotate, the volume of the space on the side where the gears are disengaged changes from small to large, forming a vacuum, sucking in the liquid, and the volume of the space on the side where the gears are meshing changes from large to small, squeezing the liquid into the pipeline. The suction chamber and the discharge chamber are separated by the meshing line of the two gears. The pressure at the discharge port of the gear pump depends entirely on the size of the resistance at the pump outlet.

[0003] Existing gear pumps lack pressure relief measures, and some pressure relief measures are difficult to maintain and install. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the prior art, the utility model provides a micro gear pump with a protective function, which can effectively solve the problem of lack of pressure relief measures in the gear pump in the prior art.

[0005] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] The utility model provides a micro gear pump with a protective function, comprising a pump body and further comprising:

[0007] A fixing frame is fixedly installed on one side of the pump body, and a motor is provided on one side of the fixing frame. The output shaft of the motor rotates and passes through the fixing frame and extends into the pump body. A threaded hole is provided on one side of the pump body, and a threaded rod is threadedly installed in the threaded hole. A pressure relief rod is fixedly installed on one end of the threaded rod close to the inside of the pump body, and a reset spring is fixedly installed on one end of the pressure relief rod away from the threaded rod, and a pressure relief ball is provided in the reset spring.

[0008] Furthermore, the fixing frame is provided with a plurality of threaded holes, the pump body is provided with a plurality of mounting holes, and bolts matching the threaded holes are inserted into the mounting holes.

[0009] Furthermore, a plurality of heat dissipation holes are provided on the side wall of the fixing frame.

[0010] Furthermore, a driving gear is fixedly installed on one end of the output shaft of the motor located at the pump body, a driven gear is rotatably installed in the pump body, and the driving gear and the driven gear are meshed with each other.

[0011] Furthermore, a sealing ring is provided at the connection between the fixing frame and the pump body.

[0012] Furthermore, a pressure relief hole is provided on one side of the threaded hole, a limit plate is fixedly installed on the pressure relief rod, the limit plate is adapted to the pressure relief hole, and the size of the pressure relief ball is larger than that of the pressure relief hole.

[0013] Furthermore, a sealing ring is sleeved on the pressure relief rod, and the sealing ring is located between the limiting plate and the threaded rod.

[0014] Compared with the known prior art, the technical solution provided by the utility model has the following beneficial effects:

[0015] By setting a pressure relief hole on one side of the pump body, the pressure relief rod can be pulled out of the pressure relief hole by rotating the threaded rod, so that the pressure of the pump body can be released from the pressure relief hole. A pressure relief ball is provided at one end of the pressure relief rod and a limit plate is provided at the other end, which not only facilitates the installation of the pressure relief rod but also facilitates the use of the pressure relief rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is an overall schematic diagram of the utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the pump body in the utility model;

[0019] Figure 3 for Figure 2 A front view of

[0020] Figure 4 It is a structural schematic diagram of the pressure relief rod part.

[0021] The numbers in the figure represent: 1. Pump body; 2. Fixing bracket; 3. Heat dissipation hole; 4. Motor; 5. Bolt; 6. Driving gear; 7. Driven gear; 8. Sealing ring; 9. Threaded rod; 10. Pressure relief rod; 11. Return spring; 12. Pressure relief ball; 13. Limiting plate; 14. Sealing ring. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] The utility model is further described below in conjunction with embodiments.

[0024] Embodiment: A micro gear pump with a protective function comprises a pump body 1, and also comprises a fixing frame 2 fixedly mounted on one side of the pump body 1, a sealing ring 8 is arranged at the connection between the fixing frame 2 and the pump body 1, a plurality of heat dissipation holes 3 are opened on the side wall of the fixing frame 2, a plurality of threaded holes are opened on the fixing frame 2, a plurality of mounting holes are opened on the pump body 1, bolts 5 matching the threaded holes are inserted in the mounting holes, a motor 4 is arranged on one side of the fixing frame 2, the output shaft of the motor 4 rotates through the fixing frame 2 and extends into the pump body 1, the output shaft of the motor 4 is located at one end of the pump body 1 and a driving gear 6 is fixedly mounted, and a driven gear is rotatably mounted in the pump body 1 7, and the driving gear 6 and the driven gear 7 are meshed with each other, a threaded hole is provided on one side of the pump body 1, a threaded rod 9 is threadedly installed in the threaded hole, a pressure relief rod 10 is fixedly installed on one end of the threaded rod 9 close to the inside of the pump body 1, a reset spring 11 is fixedly installed on the end of the pressure relief rod 10 away from the threaded rod 9, a pressure relief ball 12 is provided in the reset spring 11, a pressure relief hole is provided on one side of the threaded hole, a limit plate 13 is fixedly installed on the pressure relief rod 10, the limit plate 13 is adapted to the pressure relief hole, the size of the pressure relief ball 12 is larger than the size of the pressure relief hole, a sealing ring 14 is sleeved on the pressure relief rod 10, and the sealing ring 14 is located between the limit plate 13 and the threaded rod 9.

[0025] By setting a pressure relief hole on one side of the pump body 1, the pressure relief rod 10 is pulled out of the pressure relief hole by rotating the threaded rod 9, so that the pressure of the pump body 1 can be released from the pressure relief hole. A pressure relief ball 12 is provided at one end of the pressure relief rod 10 and a limit plate 13 is provided at the other end, which not only facilitates the installation of the pressure relief rod 10 but also facilitates the use of the pressure relief rod 10.

[0026] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some of the technical features therein by equivalents. These modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A micro gear pump with a protective function, comprising a pump body (1), characterized in that: Also includes: A fixing frame (2) is fixedly mounted on one side of the pump body (1), a motor (4) is arranged on one side of the fixing frame (2), an output shaft of the motor (4) rotates through the fixing frame (2) and extends into the pump body (1), a threaded hole is arranged on one side of the pump body (1), a threaded rod (9) is threadedly mounted in the threaded hole, a pressure relief rod (10) is fixedly mounted on one end of the threaded rod (9) close to the inside of the pump body (1), a return spring (11) is fixedly mounted on one end of the pressure relief rod (10) away from the threaded rod (9), and a pressure relief ball (12) is arranged in the return spring (11).

2. A micro gear pump with protective function according to claim 1, characterized in that: The fixing frame (2) is provided with a plurality of threaded holes, the pump body (1) is provided with a plurality of mounting holes, and bolts (5) matching the threaded holes are inserted into the mounting holes.

3. A micro gear pump with protective function according to claim 1, characterized in that: A plurality of heat dissipation holes (3) are provided on the side wall of the fixing frame (2).

4. A micro gear pump with protective function according to claim 1, characterized in that: The output shaft of the motor (4) is located at one end of the pump body (1) and is fixedly mounted with a driving gear (6), and a driven gear (7) is rotatably mounted in the pump body (1), and the driving gear (6) and the driven gear (7) are meshed with each other.

5. A micro gear pump with a protective function according to claim 1, characterized in that: A sealing ring (8) is provided at the connection between the fixing frame (2) and the pump body (1).

6. A micro gear pump with protective function according to claim 1, characterized in that: A pressure relief hole is provided on one side of the threaded hole, a limit plate (13) is fixedly mounted on the pressure relief rod (10), the limit plate (13) is adapted to the pressure relief hole, and the size of the pressure relief ball (12) is larger than that of the pressure relief hole.

7. A micro gear pump with protective function according to claim 6, characterized in that: The pressure relief rod (10) is sleeved with a sealing ring (14), and the sealing ring (14) is located between the limiting plate (13) and the threaded rod (9).

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