High-pressure diaphragm pump head fixing anti-loosening structure
By adopting a combined structure of multiple bolts, main nuts, sub nuts and anti-loose barrier rings in the high-pressure diaphragm pump head, the problem of nut loosening under high pressure is solved, and a more stable and safe pump head connection is achieved, reducing maintenance costs.
Patent Information
- Application Number
- CN202421802229.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-29
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-07-29
AI Technical Summary
When the high-pressure diaphragm pump head is subjected to alternating stress, the fixing bolts and nuts are prone to loosening, resulting in safety hazards and maintenance difficulties.
Multiple ring-distributed bolts are used, with main nuts and secondary nuts, and multiple bolts are connected into a whole through the same anti-loosening barrier ring to increase friction to prevent loosening.
It effectively prevents the nut from loosening, improves the stability and safety of the pump head, reduces maintenance costs, and protects the nut under ultra-high pressure, avoiding sputtering and safety hazards.
Smart Images
Figure CN222910241U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of diaphragm pumps, in particular to a fixing and loosening prevention structure for a high-pressure diaphragm pump head. Background Art
[0002] A diaphragm pump is also called a control pump. Its working principle is that the power end drives a piston to reciprocate in a piston cavity, thereby changing the pressure in a hydraulic cavity. The change in the pressure in the hydraulic cavity drives a diaphragm to move back and forth between the hydraulic cavity and a medium cavity, so as to realize the transportation of materials through the change in the volume in the medium cavity. A diaphragm pump mainly consists of a pump body, a pump head, a piston mechanism, and a power mechanism for driving the piston mechanism. In a traditional medium-high pressure diaphragm pump, the pump body and the pump head are connected by high-strength bolts. On the outside of the pump head, a nut is used for fastening, and gaskets are added between the nut and the outside of the pump head to prevent loosening. This structure has no problems for low-pressure pump heads or pump heads with a small pressure-bearing area.
[0003] However, in order to meet market needs, the flow rate and pressure are continuously increasing, and the diameter of the pump head and the pressure to be borne are also continuously increasing. Due to the increase in the pressure-bearing area of the pump head and the reciprocating movement of the diaphragm in the pump cavity, the pump head continuously bears alternating stress, resulting in the fixing bolts and nuts on the pump head being prone to loosening. Due to the limited frequency of user inspection and maintenance, the loosening of individual fixing bolts and nuts is not easily detected. Once some nuts become loose and the loose nuts are not stressed, the bolts and nuts with the largest load will directly break under high pressure and alternating loads, and the nuts will shoot out like bullets, posing a very large safety hazard to people and objects around. Therefore, it is necessary to propose a fixing and loosening prevention structure for a high-pressure diaphragm pump head to solve the above technical problems. Content of the Utility Model
[0004] To solve the above technical problems, the utility model provides a fixing and loosening prevention structure for a high-pressure diaphragm pump head with good stability and high safety.
[0005] The utility model is realized by adopting the following technical solutions: a diaphragm pump body and a pump head. A plurality of bolts distributed in a ring are arranged between the diaphragm pump body and the pump head. A main nut for limiting the pump head is threadedly sleeved on each of the plurality of bolts. A same anti-loosening retaining ring is sleeved on the plurality of bolts to connect the plurality of bolts into a whole, so as to improve the overall stability through mutual pulling. And a secondary nut for limiting the anti-loosening retaining ring is threadedly arranged on each of the plurality of bolts, so that the two nuts can be involved with each other, making it more difficult for the main nut to loosen with two friction surfaces.
[0006] As a further improvement of the above solution, a plurality of annularly distributed threaded grooves are arranged on one side of the diaphragm pump body close to the pump head. A plurality of through holes are arranged on the pump head, and the plurality of through holes correspond to the plurality of threaded grooves. The bolts penetrate through the through holes and one end of each bolt extends into the threaded grooves to be threadedly connected with the threaded grooves.
[0007] As a further improvement of the above solution, two sections of threads are provided on the bolt, and the two sections of threads are opposite to each other.
[0008] As a further improvement of the above solution, a plurality of through holes distributed in a ring shape are provided on the anti-loosening retaining ring, and the plurality of through holes are respectively penetrated by a plurality of bolts.
[0009] As a further improvement of the above solution, the upper, lower, left and right sides of the anti-loosening retaining ring are trimmed, and its overall contour is consistent with that of the pump head.
[0010] As a further improvement of the above solution, a notch is provided on the anti-loosening retaining ring.
[0011] As a further improvement of the above solution, a first gasket and a second gasket are respectively provided on both sides of the main nut. One side of the first gasket is in contact with the pump head, and one side of the second gasket is in contact with the anti-loosening retaining ring.
[0012] As a further improvement of the above solution, the bolt is composed of two parts, namely a screw rod and a bolt head, and the diameter of the bolt head is smaller than that of the screw rod.
[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0014] By adopting the structure of the main nut and the auxiliary nut, the two nuts can be involved with each other, so that two friction surfaces appear on the main nut, thereby eliminating the problem that the nut is easy to loosen, ensuring the stability of the pump head, making the hydraulic end of the diaphragm pump body operate more safely and stably, and greatly reducing the operation and maintenance costs;
[0015] By arranging the same anti-loosening retaining ring on a plurality of bolts and cooperating with the main nut and the auxiliary nut, the plurality of bolts are connected into a whole. Under the mutual involvement, the whole is more stable, the influence of vibration is reduced, the nut is less likely to loosen, and at the same time, the connection between the pump head and the diaphragm pump body is more stable, reducing the vibration and noise of the pump head. Even if the bolt breaks due to ultra-high pressure, the anti-loosening retaining ring can also protect the nut, so that the broken bolt and nut will be firmly fixed on the anti-loosening baffle, and there will be no sputtering situation, and no safety hazard will be caused to the surrounding. Description of the Drawings
[0016] Figure 1 It is an overall structure display diagram of the diaphragm pump body, the pump head and the pump head fixing and anti-loosening structure in the present utility model;
[0017] Figure 2 It is a partial structure display diagram of the diaphragm pump body, the pump head and the pump head fixing and anti-loosening structure in the present utility model;
[0018] Figure 3This is a partial plane sectional view showing the diaphragm pump body, pump head and the anti-loosening structure for fixing the pump head in the present utility model;
[0019] Figure 4 This is an assembly view showing the bolt, main nut, anti-loosening retaining ring and sub-nut in the present utility model;
[0020] Figure 5 This is a view showing the anti-loosening retaining ring in the present utility model;
[0021] Figure 6 This is a disassembled view showing the bolt, main nut and sub-nut in the present utility model.
[0022] Main symbol description:
[0023] 1. Diaphragm pump body; 2. Pump head; 3. Thread groove; 4. Perforation; 5. Bolt; 6. Main nut; 7. Anti-loosening retaining ring; 8. Sub-nut; 9. Notch; 10. First gasket; 11. Second gasket. Specific implementation manner
[0024] Next, in combination with the accompanying drawings and specific implementation manners, the present utility model will be further described.
[0025] Please refer to Figures 1 to 6 , the high-pressure diaphragm pump head fixing anti-loosening structure includes a diaphragm pump body 1 and a pump head 2. A plurality of bolts 5 distributed in a ring are arranged between the diaphragm pump body 1 and the pump head 2. Main nuts 6 for limiting the pump head 2 are threadedly sleeved on the plurality of bolts 5. The same anti-loosening retaining ring 7 is sleeved on the plurality of bolts 5, thereby connecting the plurality of bolts 5 into a whole, improving the overall stability through mutual pulling, and sub-nuts 8 for limiting the anti-loosening retaining ring 7 are threadedly arranged on the plurality of bolts 5, so that the two nuts can be involved with each other, making it more difficult for the main nut 6 to loosen with two friction surfaces.
[0026] Through the above technical solution, when installing the pump head 2, the pump head 2 is docked onto the diaphragm pump body 1, and then the two are fixed by a plurality of bolts 5. Then, the first gasket 10, main nut 6, second gasket 11, anti-loosening retaining ring 7 and sub-nut 8 are sequentially installed on the plurality of bolts 5. By arranging the same anti-loosening retaining ring 7 on the plurality of bolts 5 and cooperating with the main nut 6 and the sub-nut 8, the plurality of bolts 5 are connected into a whole. Under mutual pulling, the whole is more stable, reducing the influence of vibration, making the nut less likely to loosen, and at the same time making the connection between the pump head 2 and the diaphragm pump body 1 more stable, reducing the vibration and noise of the pump head 2. Even if the bolt 5 breaks due to ultra-high pressure, the anti-loosening retaining ring 7 can also protect the nut, so that the broken bolt 5 and the nut will be firmly fixed on the anti-loosening baffle, and there will be no sputtering situation, and no safety hazard will be caused to the surrounding area.
[0027] On one side of the diaphragm pump body 1 close to the pump head 2, there are a plurality of annularly distributed threaded grooves 3. On the pump head 2, there are a plurality of through holes 4, and the plurality of through holes 4 correspond to the plurality of threaded grooves 3. The bolt 5 passes through the through hole 4 and one end of it extends into the threaded groove 3 and is threadedly connected to the threaded groove 3.
[0028] Through the above technical solution, through the threaded groove 3 and the through hole 4, the bolt 5 can be used as a connecting piece to fix the two together.
[0029] There are two sections of threads on the bolt 5, and the two sections of threads are opposite.
[0030] Through the above technical solution, the two sections of threads on the bolt 5 are opposite, which makes the rotation direction of the bolt 5 when it is installed in the threaded groove 3 opposite to the rotation direction of the main nut 6 and the sub-nut 8 when they are installed on themselves. In this way, when the bolt 5 rotates in the loosening direction under vibration, it will instead be further tightened with the main nut 6 and the sub-nut 8, thereby ensuring that the bolt 5 is less likely to loosen itself.
[0031] The anti-loosening retaining ring 7 is provided with a plurality of annularly distributed through holes, and the plurality of through holes are respectively penetrated by the plurality of bolts 5.
[0032] Through the above technical solution, the through holes correspond to the plurality of bolts 5, so that the anti-loosening retaining ring 7 can be smoothly sleeved on the plurality of bolts 5 and connect the plurality of bolts 5 into a whole.
[0033] The upper, lower, and both sides of the anti-loosening retaining ring 7 are trimmed, and its overall contour is the same as that of the pump head 2.
[0034] Through the above technical solution, since high-pressure diaphragm pumps are generally used in multiple combinations, therefore, by limiting the outer contour of the anti-loosening retaining ring 7, it will not limit the combination of multiple high-pressure diaphragm pumps.
[0035] The anti-loosening retaining ring 7 is provided with a notch 9.
[0036] Through the above technical solution, the design of the notch 9 makes the anti-loosening retaining ring 7 not restrict the liquid pipe of the high-pressure diaphragm pump.
[0037] On both sides of the main nut 6, there are a first gasket 10 and a second gasket 11 respectively. One side of the first gasket 10 is in contact with the pump head 2, and one side of the second gasket 11 is in contact with the anti-loosening retaining ring 7.
[0038] Through the above technical solution, the first gasket 10 and the second gasket 11 can increase the friction between the main nut 6 and the pump head 2 and the anti-loosening retaining ring 7 to prevent them from loosening.
[0039] The bolt 5 is composed of a screw rod and a bolt head, and the diameter of the bolt head is smaller than the diameter of the screw rod.
[0040] Through the above technical solution, in order to ensure that the bolt 5 can be smoothly screwed into the threaded groove 3 and also enable the main nut 6 and the auxiliary nut 8 to be smoothly screwed onto the bolt 5, the diameter of the bolt head needs to be smaller than the diameter of the threaded rod, so as to avoid restricting the nut.
[0041] The above embodiments are only the preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantive changes and substitutions made by those skilled in the art based on the present invention fall within the scope of protection required by the present invention.
Claims
1. A high-pressure diaphragm pump head fixing and anti-loosening structure, comprising a diaphragm pump body (1) and a pump head (2), wherein a plurality of bolts (5) distributed in an annular shape are arranged between the diaphragm pump body (1) and the pump head (2), and a main nut (6) for limiting the pump head (2) is threadedly sleeved on each of the plurality of bolts (5), characterized in that: The same anti-loosening retaining ring (7) is sleeved on the plurality of bolts (5), thereby connecting the plurality of bolts (5) into a whole, and improving the overall stability by mutual entanglement, and the plurality of bolts (5) are all threadedly provided with a secondary nut (8) for limiting the anti-loosening retaining ring (7), so that the two nuts can be mutually involved, so that the main nut (6) has two friction surfaces and is less likely to loosen.
2. The high-pressure diaphragm pump head fixing and anti-loosening structure according to claim 1, characterized in that: A plurality of thread grooves (3) distributed in an annular shape are provided on one side of the diaphragm pump body (1) close to the pump head (2); a plurality of through holes (4) are provided on the pump head (2); the plurality of through holes (4) correspond to the plurality of thread grooves (3); the bolt (5) passes through the through holes (4) and one end of the bolt (5) extends into the thread groove (3) and is threadably connected to the thread groove (3).
3. The high-pressure diaphragm pump head fixing and anti-loosening structure according to claim 1, characterized in that: The bolt (5) is provided with two sections of threads, and the two sections of threads are opposite to each other.
4. The high-pressure diaphragm pump head fixing and anti-loosening structure according to claim 1, characterized in that: The anti-loosening retaining ring (7) is provided with a plurality of through holes distributed in an annular shape, and the plurality of through holes are respectively penetrated by a plurality of bolts (5).
5. The high-pressure diaphragm pump head fixing and anti-loosening structure according to claim 1, characterized in that: The upper, lower and both sides of the anti-loosening retaining ring (7) are trimmed, and its overall profile is consistent with the pump head (2).
6. The high-pressure diaphragm pump head fixing and anti-loosening structure according to claim 1, characterized in that: The anti-loosening retaining ring (7) is provided with a notch (9).
7. The high-pressure diaphragm pump head fixing and anti-loosening structure according to claim 1, characterized in that: A first gasket (10) and a second gasket (11) are respectively arranged on both sides of the main nut (6); one side of the first gasket (10) is in contact with the pump head (2), and one side of the second gasket (11) is in contact with the anti-loosening retaining ring (7).
8. The high-pressure diaphragm pump head fixing and anti-loosening structure according to claim 1, characterized in that: The bolt (5) consists of two parts: a screw rod and a bolt head, and the diameter of the bolt head is smaller than the diameter of the screw rod.