Gear pump with pressure relief protection function

Abstract

The utility model relates to the technical field of gear pumps, in particular to a gear pump with a pressure relief protection function, which comprises a sealing seat and a pump body, and further comprises a pressure relief hole formed in one side of the pump body, a threaded pipe is mounted in the pressure relief hole in a threaded manner, a pressure relief rod is movably inserted in the threaded pipe, a limiting block is fixedly mounted on the pressure relief rod, and the limiting block is fixedly connected with the sealing seat. The size of the limiting block is larger than the inner diameter of the threaded pipe, and the pressure relief rod is sleeved with a reset spring. The pressure relief hole is formed in one side of the pump body, the pressure relief rod is arranged in the pressure relief hole, when the internal pressure is large, the pressure in the pump body is relieved by adjusting the position of the pressure relief rod, after the pressure reaches the standard, the reset spring is used for helping the pressure relief rod reset, and internal media are prevented from continuously leaking.

Description

Technical Field

[0001] The utility model relates to the technical field of gear pumps, in particular to a gear pump with a pressure relief protection 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 excessive internal pressure will affect the normal use of the pump body. Utility Model Content

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

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

[0006] The utility model provides a gear pump with a pressure relief protection function, comprising a sealing seat and a pump body, and also comprising:

[0007] A pressure relief hole is provided on one side of the pump body, a threaded tube is threadedly installed in the pressure relief hole, a pressure relief rod is movably inserted in the threaded tube, a limit block is fixedly installed on the pressure relief rod, the size of the limit block is larger than the inner diameter of the threaded tube, and a reset spring is sleeved on the pressure relief rod.

[0008] Furthermore, the sealing seat is provided with a plurality of threaded holes, the pump body is provided with a plurality of mounting holes corresponding to the threaded holes one by one, each of the mounting holes is provided with a bolt, and the bolt is threadably matched with the threaded hole.

[0009] Furthermore, an adjustment hole is provided on the sealing seat, and a sealing rod is threadedly installed in the adjustment hole.

[0010] Furthermore, a first water inlet hole is opened on the top wall of the pump body, and a first sealing cover is threadedly installed in the first water inlet hole.

[0011] Furthermore, a first water outlet hole is formed on a side of the pump body away from the sealing seat, and a third sealing cover is threadedly installed in the first water outlet hole.

[0012] Furthermore, a second water inlet hole is opened on the bottom wall of the pump body, and a second sealing cover is threadedly installed in the second water inlet hole.

[0013] Furthermore, a second water outlet hole is formed on a side of the pump body away from the sealing seat, and a fourth sealing cover is threadedly installed in the second water outlet hole.

[0014] Furthermore, a sealing ring is provided at the connection between the sealing seat and the pump body.

[0015] Compared with the known prior art, the technical solution provided by the utility model has the following beneficial effects:

[0016] A pressure relief hole is set on one side of the pump body, and a pressure relief rod is set in the pressure relief hole. When the internal pressure is high, the pressure inside the pump body can be released by adjusting the position of the pressure relief rod. After the pressure reaches the standard, the reset spring is used to help the pressure relief rod reset to prevent the internal medium from continuing to leak out. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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.

[0018] Figure 1 It is an overall schematic diagram of the utility model;

[0019] Figure 2 It is a cross-sectional view of the utility model;

[0020] Figure 3 It is a schematic diagram of the internal structure of the pump body;

[0021] Figure 4 for Figure 3 Front view of part.

[0022] The numbers in the figure represent: 1. sealing seat; 2. pump body; 3. bolt; 4. sealing rod; 5. sealing ring; 6. first water inlet hole; 7. first sealing cover; 8. second water inlet hole; 9. second sealing cover; 10. first water outlet hole; 11. third sealing cover; 12. second water outlet hole; 13. fourth sealing cover; 14. pressure relief hole; 15. limit block; 16. reset spring; 17. pressure relief rod. DETAILED DESCRIPTION

[0023] 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.

[0024] The utility model is further described below in conjunction with embodiments.

[0025] Embodiment: A gear pump with a pressure relief protection function comprises a sealing seat 1 and a pump body 2, wherein the sealing seat 1 is provided with a plurality of threaded holes, the pump body 2 is provided with a plurality of mounting holes corresponding to the threaded holes, each mounting hole is provided with a bolt 3, the bolt 3 is threadedly matched with the threaded hole, the sealing seat 1 is provided with an adjustment hole, a sealing rod 4 is threadedly installed in the adjustment hole, a first water inlet hole 6 is provided on the top wall of the pump body 2, a first sealing cover 7 is threadedly installed in the first water inlet hole 6, a first water outlet hole 10 is provided on the side of the pump body 2 away from the sealing seat 1, a third sealing cover 11 is threadedly installed in the first water outlet hole 10 A second water inlet 8 is provided on the bottom wall of the pump body 2, a second sealing cover 9 is threadedly installed in the second water inlet hole 8, a second water outlet 12 is provided on the side of the pump body 2 away from the sealing seat 1, a fourth sealing cover 13 is threadedly installed in the second water outlet hole 12, a sealing ring 5 is provided at the connection between the sealing seat 1 and the pump body 2, and a pressure relief hole 14 is provided on one side of the pump body 2, a threaded pipe is threadedly installed in the pressure relief hole 14, a pressure relief rod 17 is movably inserted in the threaded pipe, a limit block 15 is fixedly installed on the pressure relief rod 17, the size of the limit block 15 is larger than the inner diameter of the threaded pipe, and a reset spring 16 is sleeved on the pressure relief rod 17.

[0026] A pressure relief hole 14 is provided on one side of the pump body 2, and a pressure relief rod 17 is provided in the pressure relief hole 14. When the internal pressure is relatively high, the pressure inside the pump body 2 is released by adjusting the position of the pressure relief rod 17. After the pressure reaches the standard, the return spring 16 is used to help the pressure relief rod 17 to return to its original position to prevent the internal medium from continuing to leak out.

[0027] 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 gear pump with a pressure relief protection function, comprising a sealing seat (1) and a pump body (2), characterized in that: Also includes: A pressure relief hole (14) is provided on one side of the pump body (2), a threaded tube is threadedly installed in the pressure relief hole (14), a pressure relief rod (17) is movably inserted in the threaded tube, a limit block (15) is fixedly installed on the pressure relief rod (17), the size of the limit block (15) is larger than the inner diameter of the threaded tube, and a return spring (16) is sleeved on the pressure relief rod (17).

2. A gear pump with pressure relief protection function according to claim 1, characterized in that: The sealing seat (1) is provided with a plurality of threaded holes, the pump body (2) is provided with a plurality of mounting holes corresponding to the threaded holes one by one, each mounting hole is provided with a bolt (3), and the bolt (3) is threadably matched with the threaded hole.

3. The gear pump with pressure relief protection function according to claim 1, characterized in that: The sealing seat (1) is provided with an adjustment hole, and a sealing rod (4) is threadedly installed in the adjustment hole.

4. The gear pump with pressure relief protection function according to claim 1, characterized in that: A first water inlet hole (6) is provided on the top wall of the pump body (2), and a first sealing cover (7) is threadedly mounted in the first water inlet hole (6).

5. The gear pump with pressure relief protection function according to claim 1, characterized in that: A first water outlet hole (10) is provided on a side of the pump body (2) away from the sealing seat (1), and a third sealing cover (11) is threadedly mounted in the first water outlet hole (10).

6. The gear pump with pressure relief protection function according to claim 1, characterized in that: A second water inlet hole (8) is provided on the bottom wall of the pump body (2), and a second sealing cover (9) is threadedly installed in the second water inlet hole (8).

7. The gear pump with pressure relief protection function according to claim 1, characterized in that: A second water outlet hole (12) is provided on a side of the pump body (2) away from the sealing seat (1), and a fourth sealing cover (13) is threadedly mounted in the second water outlet hole (12).

8. The gear pump with pressure relief protection function according to claim 1, characterized in that: A sealing ring (5) is provided at the connection between the sealing seat (1) and the pump body (2).

Images