Diaphragm pump overload protection device

Abstract

The utility model discloses a diaphragm pump overload protection device which comprises a shell, an overload protection mechanism and a buffer mechanism, a closed containing cavity is formed in the shell, and a hydraulic inlet, a hydraulic outlet and a pressure relief opening are formed in the shell; the overload protection mechanism comprises a safety valve, a back pressure pipe and a back pressure valve; the buffer mechanism comprises an energy storage tank and a diaphragm. The diaphragm pump overload protection device has the beneficial effects that the hydraulic inlet is communicated with the liquid outlet of the power end, the hydraulic outlet is communicated with the liquid inlet of the diaphragm chamber of the diaphragm pump, and when the pressure of liquid discharged from the power end exceeds the safety pressure of the safety valve, the liquid can enter the back pressure pipe through the safety valve; and then the liquid enters the energy storage cavity of the energy storage tank, so that the diaphragm is pushed to extrude the buffering cavity, energy storage buffering is performed, the pressure change amplitude of the liquid entering the diaphragm chamber can be reduced, the impact force borne by the normal-temperature area of the fluid end of the diaphragm pump is reduced, the vibration strength is reduced, and the service life of parts is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of diaphragm pumps, and in particular to an overload protection device for a diaphragm pump. Background Art

[0002] A diaphragm pump is a positive displacement pump that transports liquid through a flexible diaphragm. Its working principle mainly relies on the back and forth movement of the diaphragm to change the volume of the studio.

[0003] For diaphragm pumps used for high-temperature slurry transportation, the normal temperature zone and high temperature zone of the hydraulic end of the diaphragm pump are usually separated by an insulating pipe. The high temperature zone of the hydraulic end can usually be pressure-buffered by a buffer, while the normal temperature zone of the hydraulic end is far away from the buffer and cannot be effectively buffered, resulting in reduced flexibility and increased rigidity, which is not conducive to ensuring the life of components. Summary of the Invention

[0004] The purpose of this application is to overcome the above-mentioned technical deficiencies and propose a diaphragm pump overload protection device to solve the technical problem in the prior art that the normal temperature zone of the hydraulic end of the diaphragm pump is far away from the buffer, so it cannot be effectively buffered, the flexibility is reduced, the rigidity is increased, and it is not conducive to ensuring the life of components.

[0005] In order to achieve the above technical objectives, this application adopts the following technical solutions:

[0006] The present application provides a diaphragm pump overload protection device, comprising:

[0007] A shell, wherein a sealed accommodating cavity is formed in the shell, and a hydraulic inlet, a hydraulic outlet and a pressure relief port are opened on the shell;

[0008] an overload protection mechanism, the overload protection mechanism comprising a safety valve, a back pressure pipe and a back pressure valve, the inlet of the safety valve being connected to the pressure relief port, the outlet of the safety valve being connected to one end of the back pressure pipe, and the inlet of the back pressure valve being connected to one end of the back pressure pipe; and

[0009] The buffer mechanism includes an energy storage tank and a diaphragm. The diaphragm is fixed in the energy storage tank to separate the inner cavity of the energy storage tank into an energy storage chamber and a buffer chamber. The energy storage chamber is connected to the back pressure pipe, and the buffer chamber is filled with nitrogen.

[0010] In some embodiments, the inlet of the safety valve is fixed to the pressure relief port via a plurality of first fixing screws.

[0011] In some embodiments, the overload protection mechanism further includes a connecting pipe, one end of which is connected to the outlet of the safety valve, and the other end of which is connected to one end of the back pressure pipe.

[0012] In some embodiments, the other end of the connecting pipe is fixedly connected to one end of the back pressure pipe via a plurality of fixing bolts.

[0013] In some embodiments, the diaphragm is a rubber diaphragm.

[0014] In some embodiments, the buffer mechanism also includes a fixing seat, a limiting block and a clamp, one end of the fixing seat is fixed to the shell, the limiting block is fixed to the fixing seat, a limiting hole is provided on the limiting block, the limiting hole is used to place the energy storage tank, one end of the clamp is fixed to the fixing seat, and the other end of the clamp is fixedly sleeved on the energy storage tank.

[0015] In some embodiments, one end of the fixing base is fixed to the housing via a plurality of second fixing screws.

[0016] In some embodiments, the limiting block is fixed to the fixing seat via a plurality of third fixing screws.

[0017] In some embodiments, the overload protection mechanism further includes a pressure gauge, which is installed on the back pressure pipe.

[0018] In some embodiments, the back pressure tube is fixed to the housing via a plurality of fourth fixing screws.

[0019] Compared with the prior art, the beneficial effect of the diaphragm pump overload protection device provided by the present application is: when in use, the hydraulic inlet is connected to the discharge port of the power end, and the hydraulic outlet is connected to the liquid inlet of the diaphragm chamber of the diaphragm pump. When the pressure of the liquid discharged from the power end exceeds the safety pressure of the safety valve, the liquid will enter the back pressure pipe through the safety valve and then enter the energy storage chamber of the energy storage tank, thereby pushing the diaphragm to squeeze the buffer chamber, thereby performing energy storage buffering, which can reduce the pressure change amplitude of the liquid entering the diaphragm chamber, thereby reducing the impact force on the normal temperature zone of the hydraulic end of the diaphragm pump, reducing the vibration intensity, and extending the life of components. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of a diaphragm pump overload protection device provided by one embodiment of the present application;

[0021] Figure 2 yes Figure 1 A side view of the diaphragm pump overload protection device;

[0022] Explanation of the accompanying drawings: 1-housing, 11-hydraulic outlet, 12-pressure relief port, 2-overload protection mechanism, 21-safety valve, 211-first fixing screw, 22-back pressure pipe, 221-fourth fixing screw, 23-back pressure valve, 24-connecting pipe, 241-fixing bolt, 25-pressure gauge, 3-buffer mechanism, 31-energy storage tank, 311-energy storage chamber, 312-buffer chamber, 32-diaphragm, 33-fixing seat, 331-second fixing screw, 34-limiting block, 341-third fixing screw, 35-hoop. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0024] In order to solve the technical problem in the prior art that the normal temperature zone of the hydraulic end of the diaphragm pump is far away from the buffer and therefore cannot be effectively buffered, resulting in reduced flexibility and increased rigidity, which is not conducive to ensuring the life of components, the present application provides a diaphragm pump overload protection device that can buffer the normal temperature zone of the hydraulic end of the diaphragm pump, improve its flexibility and extend its service life.

[0025] See also Figure 1 and Figure 2 , Figure 1 This is a structural diagram of a diaphragm pump overload protection device in an embodiment of the present application. The diaphragm pump overload protection device includes a housing 1 , an overload protection mechanism 2 and a buffer mechanism 3 .

[0026] A sealed accommodating cavity is formed in the housing 1, and a hydraulic inlet (not shown), a hydraulic outlet 11 and a pressure relief port 12 are provided on the housing 1;

[0027] The overload protection mechanism 2 includes a safety valve 21, a back pressure pipe 22 and a back pressure valve 23. The inlet of the safety valve 21 is connected to the pressure relief port 12, the outlet of the safety valve 21 is connected to one end of the back pressure pipe 22, and the inlet of the back pressure valve 23 is connected to one end of the back pressure pipe 22; wherein, the function of the back pressure valve 23 is to provide back pressure to prevent the liquid from being discharged directly.

[0028] The buffer mechanism 3 includes an energy storage tank 31 and a diaphragm 32. The diaphragm 32 is fixed in the energy storage tank 31 to separate the inner cavity of the energy storage tank 31 into an energy storage chamber 311 and a buffer chamber 312. The energy storage chamber 311 is connected to the back pressure pipe 22, and the buffer chamber 312 is filled with nitrogen.

[0029] During use, the hydraulic inlet is connected to the discharge port of the power end, and the hydraulic outlet 11 is connected to the liquid inlet of the diaphragm chamber of the diaphragm pump. When the pressure of the liquid discharged from the power end exceeds the safety pressure of the safety valve 21, the liquid will enter the back pressure pipe 22 through the safety valve 21, and then enter the energy storage chamber 311 of the energy storage tank 31, thereby pushing the diaphragm 32 to squeeze the buffer chamber 312, thereby performing energy storage buffering, which can reduce the pressure change amplitude of the liquid entering the diaphragm chamber, thereby reducing the impact force on the normal temperature zone of the hydraulic end of the diaphragm pump, reducing the vibration intensity, and thus extending the life of components.

[0030] In one embodiment, see Figure 1 and Figure 2 The inlet of the safety valve 21 is fixed to the pressure relief port 12 via a plurality of first fixing screws 211 .

[0031] In one embodiment, see Figure 1 and Figure 2 The overload protection mechanism 2 further includes a connecting pipe 24 , one end of which is connected to the outlet of the safety valve 21 , and the other end of which is connected to one end of the back pressure pipe 22 .

[0032] In one embodiment, see Figure 1 and Figure 2 The other end of the connecting pipe 24 is fixedly connected to one end of the back pressure pipe 22 via a plurality of fixing bolts 241 .

[0033] In one embodiment, see Figure 1 and Figure 2 , the diaphragm 32 is a rubber diaphragm.

[0034] In one embodiment, see Figure 1 and Figure 2 The buffer mechanism 3 also includes a fixing seat 33, a limiting block 34 and a clamp 35. One end of the fixing seat 33 is fixed to the shell 1, and the limiting block 34 is fixed to the fixing seat 33. A limiting hole is provided on the limiting block 34, and the limiting hole is used to place the energy storage tank 31. The aperture of the limiting hole is smaller than the maximum diameter of the energy storage tank 31 and larger than the minimum diameter of the energy storage tank 31, so that the energy storage tank 31 can be stuck in the limiting hole without falling. One end of the clamp 35 is fixed to the fixing seat 33, and the other end of the clamp 35 is fixedly sleeved on the energy storage tank 31, thereby effectively fixing the energy storage tank 31 and preventing the energy storage tank 31 from shaking.

[0035] In one embodiment, see Figure 1 and Figure 2 One end of the fixing seat 33 is fixed to the housing 1 via a plurality of second fixing screws 331 .

[0036] In one embodiment, see Figure 1 and Figure 2 The limiting block 34 is fixed to the fixing seat 33 via a plurality of third fixing screws 341 .

[0037] In one embodiment, see Figure 1 and Figure 2 The overload protection mechanism 2 further includes a pressure gauge 25 , which is installed on the back pressure pipe 22 and is used to detect liquid pressure.

[0038] In one embodiment, see Figure 1 and Figure 2 The back pressure pipe 22 is fixed to the housing 1 via a plurality of fourth fixing screws 221 .

[0039] In order to better understand this application, the following Figures 1 to 2 The technical solution of the present application is described in detail: when in use, the hydraulic inlet is connected to the discharge port of the power end, and the hydraulic outlet 11 is connected to the liquid inlet of the diaphragm chamber of the diaphragm pump. When the pressure of the liquid discharged from the power end exceeds the safety pressure of the safety valve 21, the liquid will enter the back pressure pipe 22 through the safety valve 21, and then enter the energy storage chamber 311 of the energy storage tank 31, thereby pushing the diaphragm 32 to squeeze the buffer chamber 312, thereby performing energy storage buffering, which can reduce the pressure change amplitude of the liquid entering the diaphragm chamber, thereby reducing the impact force on the normal temperature zone of the hydraulic end of the diaphragm pump, reducing the vibration intensity, and thus extending the life of components.

[0040] The specific implementation methods of the present application described above do not limit the scope of protection of the present application. Any other corresponding changes and modifications made based on the technical concept of the present application should be included in the scope of protection of the claims of the present application.

Claims

1. A diaphragm pump overload protection device, characterized in that: include: A shell, wherein a sealed accommodating cavity is formed in the shell, and a hydraulic inlet, a hydraulic outlet and a pressure relief port are opened on the shell; an overload protection mechanism, the overload protection mechanism comprising a safety valve, a back pressure pipe and a back pressure valve, the inlet of the safety valve being connected to the pressure relief port, the outlet of the safety valve being connected to one end of the back pressure pipe, and the inlet of the back pressure valve being connected to one end of the back pressure pipe; and The buffer mechanism includes an energy storage tank and a diaphragm. The diaphragm is fixed in the energy storage tank to separate the inner cavity of the energy storage tank into an energy storage chamber and a buffer chamber. The energy storage chamber is connected to the back pressure pipe, and the buffer chamber is filled with nitrogen.

2. The diaphragm pump overload protection device according to claim 1, characterized in that: The inlet of the safety valve is fixed to the pressure relief port via a plurality of first fixing screws.

3. The diaphragm pump overload protection device according to claim 1, characterized in that: The overload protection mechanism further includes a connecting pipe, one end of which is communicated with the outlet of the safety valve, and the other end of which is communicated with one end of the back pressure pipe.

4. The diaphragm pump overload protection device according to claim 3, characterized in that: The other end of the connecting pipe is fixedly connected to one end of the back pressure pipe via a plurality of fixing bolts.

5. The diaphragm pump overload protection device according to claim 1, characterized in that: The diaphragm is a rubber diaphragm.

6. The diaphragm pump overload protection device according to claim 1, characterized in that: The buffer mechanism also includes a fixing seat, a limiting block and a clamp. One end of the fixing seat is fixed to the shell, the limiting block is fixed to the fixing seat, a limiting hole is provided on the limiting block, and the limiting hole is used to place the energy storage tank. One end of the clamp is fixed to the fixing seat, and the other end of the clamp is fixedly sleeved on the energy storage tank.

7. The diaphragm pump overload protection device according to claim 6, characterized in that: One end of the fixing seat is fixed to the housing via a plurality of second fixing screws.

8. The diaphragm pump overload protection device according to claim 6, characterized in that: The limiting block is fixed to the fixing seat via a plurality of third fixing screws.

9. The diaphragm pump overload protection device according to claim 1, characterized in that: The overload protection mechanism further includes a pressure gauge, which is installed on the back pressure pipe.

10. The diaphragm pump overload protection device according to claim 1, characterized in that: The back pressure pipe is fixed to the housing via a plurality of fourth fixing screws.

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