Diaphragm pump overload protection device

Abstract

The present application discloses a diaphragm pump overload protection device, comprising a housing, an overload protection mechanism, and a cushioning mechanism, wherein a sealed accommodating cavity is formed in the housing, and the housing is provided with a hydraulic inlet, hydraulic outlets, and a pressure relief port; the overload protection mechanism comprises a safety valve, a back pressure pipe, and back pressure valves; and the cushioning mechanism comprises an energy storage tank and a diaphragm. The diaphragm pump overload protection device provided by the present application has the following beneficial effects: the hydraulic inlet is communicated with a liquid discharge port of a power end, and the hydraulic outlets are communicated with a liquid inlet of a diaphragm chamber of a diaphragm pump; when the pressure of liquid discharged from the power end exceeds the safety pressure of the safety valve, the liquid enters the back pressure pipe through the safety valve and then enters an energy storage cavity of the energy storage tank, so as to push the diaphragm to press a cushioning cavity, thereby performing energy storage and cushioning, which can reduce the amplitude of pressure change of the liquid entering the diaphragm chamber, thereby reducing the impact force on a normal temperature area of a hydraulic end of the diaphragm pump, reducing the vibration intensity, and prolonging the service life of components.

Description

Diaphragm pump overload protection device TECHNICAL FIELD

[0001] The present application relates to the technical field of diaphragm pumps, in particular to a diaphragm pump overload protection device. BACKGROUND

[0002] The diaphragm pump is a positive displacement pump for transporting liquid through a flexible diaphragm, and its working principle mainly depends on the back and forth stimulation of the diaphragm to change the working chamber volume.

[0003] For the diaphragm pump for high-temperature slurry transportation, the normal temperature area and the high-temperature area of the liquid end of the diaphragm pump are usually separated by a heat insulation pipe, the high-temperature area of the liquid end can usually be pressure buffered by a buffer, and the normal temperature area of the liquid end is far away from the buffer, so it cannot be effectively buffered, the flexibility is reduced, the rigidity is increased, and the service life of the parts is not guaranteed.

[0004] SUMMARY

[0005] The present application aims to overcome the above technical deficiencies and provide a diaphragm pump overload protection device to solve the technical problem that the normal temperature area of the liquid end of the diaphragm pump in the prior art is far away from the buffer, so it cannot be effectively buffered, the flexibility is reduced, the rigidity is increased, and the service life of the parts is not guaranteed.

[0006] To achieve the above technical purpose, the present application adopts the following technical scheme:

[0007] The present application provides a diaphragm pump overload protection device, which comprises:

[0008] A housing, a closed containing cavity is formed in the housing, a liquid inlet, a liquid outlet and a pressure relief port are formed on the housing;

[0009] An overload protection mechanism, the overload protection mechanism comprises a safety valve, a back pressure pipe and a back pressure valve, the inlet of the safety valve is in communication with the pressure relief port, the outlet of the safety valve is in communication with one end of the back pressure pipe, and the inlet of the back pressure valve is in communication with one end of the back pressure pipe; and

[0010] A buffer mechanism, the buffer mechanism comprises an energy storage tank and a diaphragm, the diaphragm is fixed in the energy storage tank to divide the inner cavity of the energy storage tank into an energy storage cavity and a buffer cavity, the energy storage cavity is in communication with the back pressure pipe, and the buffer cavity is filled with nitrogen.

[0011] In some embodiments, the inlet of the safety valve is fixed to the pressure relief port by a plurality of first fixed screws.

[0012] In some embodiments, the overload protection mechanism further comprises a connecting pipe, one end of the connecting pipe is in communication with the outlet of the safety valve, and the other end of the connecting pipe is in communication with one end of the back pressure pipe.

[0013] In some embodiments, the other end of the connecting pipe is fixedly connected with one end of the back pressure pipe via a plurality of fixing bolts.

[0014] In some embodiments, the diaphragm is a rubber diaphragm.

[0015] In some embodiments, the buffer mechanism further comprises a fixing seat, a limiting block and a hoop, one end of the fixing seat is fixed to the shell, the limiting block is fixed to the fixing seat, a limiting hole is formed in the limiting block, the limiting hole is used for putting the energy storage tank, one end of the hoop is fixed to the fixing seat, and the other end of the hoop is fixedly sleeved on the energy storage tank.

[0016] In some embodiments, one end of the fixing seat is fixed to the shell via a plurality of second fixing screws.

[0017] In some embodiments, the limiting block is fixed to the fixing seat via a plurality of third fixing screws.

[0018] In some embodiments, the overload protection mechanism further comprises a pressure gauge, and the pressure gauge is installed on the back pressure pipe.

[0019] In some embodiments, the back pressure pipe is fixed to the shell via a plurality of fourth fixing screws.

[0020] Compared with the prior art, the diaphragm pump overload protection device provided by the application has the beneficial effects that: in use, the liquid inlet is communicated with the liquid outlet of the power end, and the liquid outlet is communicated with the liquid inlet of the diaphragm chamber of the diaphragm pump; when the pressure of the liquid discharged by the power end exceeds the safety pressure of the safety valve, the liquid enters the back pressure pipe through the safety valve, and then enters the energy storage cavity of the energy storage tank, so as to push the diaphragm to extrude the buffer cavity, thereby performing energy storage and buffering, the pressure variation range of the liquid entering the diaphragm chamber can be reduced, the impact force on the normal temperature zone of the liquid force end of the diaphragm pump can be reduced, the vibration intensity can be reduced, and the service life of the parts can be prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0021] Fig. 1 is a structural schematic view of a diaphragm pump overload protection device provided by an embodiment of the application;

[0022] Fig. 2 is a side view of the diaphragm pump overload protection device in Fig. 1;

[0023] Explanation of reference signs: 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 cavity, 312 - buffer cavity, 32 - diaphragm, 33 - fixing seat, 331 - second fixing screw, 34 - limiting block, 341 - third fixing screw, 35 - hoop. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0025] In order to solve the technical problem that the normal temperature zone of the hydraulic end of the diaphragm pump cannot be effectively buffered, the flexibility is reduced, the rigidity is increased, and the service life of the parts is not guaranteed due to the distance from the buffer in the prior art, the present application provides a diaphragm pump overload protection device which can buffer the normal temperature zone of the hydraulic end of the diaphragm pump, improve its flexibility, and prolong its service life.

[0026] Please refer to FIG. 1 and FIG. 2, FIG. 1 is a structural schematic diagram of a diaphragm pump overload protection device in an embodiment of the present application, the diaphragm pump overload protection device comprises a housing 1, an overload protection mechanism 2 and a buffer mechanism 3.

[0027] A closed containing cavity is formed in the housing 1, and a hydraulic inlet (not shown), a hydraulic outlet 11 and a pressure relief port 12 are formed on the housing 1;

[0028] The overload protection mechanism 2 comprises a safety valve 21, a back pressure pipe 22 and a back pressure valve 23, the inlet of the safety valve 21 is in communication with the pressure relief port 12, the outlet of the safety valve 21 is in communication with one end of the back pressure pipe 22, and the inlet of the back pressure valve 23 is in communication with one end of the back pressure pipe 22; wherein the back pressure valve 23 provides back pressure to prevent the liquid from being directly discharged.

[0029] The buffer mechanism 3 comprises an energy storage tank 31 and a diaphragm 32, the diaphragm 32 is fixed in the energy storage tank 31 to divide the inner cavity of the energy storage tank 31 into an energy storage cavity 311 and a buffer cavity 312, the energy storage cavity 311 is in communication with the back pressure pipe 22, and the buffer cavity 312 is filled with nitrogen.

[0030] In use, the liquid inlet is communicated with the liquid outlet of the power end, and the liquid outlet 11 is communicated with 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 enters the back pressure pipe 22 through the safety valve 21, and then enters the energy storage cavity 311 of the energy storage tank 31, so as to push the diaphragm 32 to extrude the buffer cavity 312, thereby performing energy storage and buffering, reducing the pressure variation range of the liquid entering the diaphragm chamber, reducing the impact force on the normal temperature zone of the liquid end of the diaphragm pump, reducing the vibration intensity, thereby prolonging the service life of the parts.

[0031] In one embodiment, referring to FIGS. 1 and 2, the inlet of the safety valve 21 is fixed to the pressure relief port 12 through a plurality of first fixing screws 211.

[0032] In one embodiment, referring to FIGS. 1 and 2, the overload protection mechanism 2 further comprises a connecting pipe 24, one end of the connecting pipe 24 is communicated with the outlet of the safety valve 21, and the other end of the connecting pipe 24 is communicated with one end of the back pressure pipe 22.

[0033] In one embodiment, referring to FIGS. 1 and 2, the other end of the connecting pipe 24 is fixedly connected with one end of the back pressure pipe 22 through a plurality of fixing bolts 241.

[0034] In one embodiment, referring to FIGS. 1 and 2, the diaphragm 32 is a rubber diaphragm.

[0035] In one embodiment, referring to FIGS. 1 and 2, the buffer mechanism 3 further comprises 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, the limiting block 34 is fixed to the fixing seat 33, a limiting hole is formed in the limiting block 34, the limiting hole is used to put the energy storage tank 31, the hole diameter 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 clamped in the limiting hole without falling down, 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.

[0036] In one embodiment, referring to FIGS. 1 and 2, one end of the fixing seat 33 is fixed to the shell 1 through a plurality of second fixing screws 331.

[0037] In one embodiment, referring to FIGS. 1 and 2, the limiting block 34 is fixed to the fixing seat 33 through a plurality of third fixing screws 341.

[0038] In one embodiment, referring to FIG. 1 and FIG. 2, the overload protection mechanism 2 further comprises a pressure gauge 25 installed on the back pressure pipe 22, which is used to detect the liquid pressure.

[0039] In one embodiment, referring to FIG. 1 and FIG. 2, the back pressure pipe 22 is fixed to the shell 1 via fourth fixing screws 221.

[0040] In order to better understand the present application, the technical solutions of the present application are described in detail below in combination with FIG. 1 and FIG. 2: in use, the liquid inlet is communicated with the liquid outlet of the power end, and the liquid outlet 11 is communicated with the liquid inlet of the diaphragm chamber of the diaphragm pump; when the pressure of the liquid discharged by the power end exceeds the safety pressure of the safety valve 21, the liquid enters the back pressure pipe 22 through the safety valve 21, and then enters the energy storage cavity 311 of the energy storage tank 31, thereby pushing the diaphragm 32 to extrude the buffer cavity 312, so as to perform energy storage and buffering, which can reduce the pressure variation range of the liquid entering the diaphragm chamber, thereby reducing the impact force on the normal temperature zone of the liquid end of the diaphragm pump, reducing the vibration intensity, thereby prolonging the service life of the parts.

[0041] The specific embodiments of the present application described above do not constitute a limitation on the protection scope of the present application. Any various other corresponding changes and modifications made according to the technical concept of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A diaphragm pump overload protection device, characterized by, The utility model relates to a kind of nitrogen gas buffer type hydraulic buffer device, including: Shell, a closed containing cavity is formed in the shell, and hydraulic inlet, hydraulic outlet and pressure relief port are arranged on the shell; Overload protection mechanism, the overload protection mechanism includes safety valve, back pressure pipe and back pressure valve, the inlet of the safety valve is communicated with the pressure relief port, the outlet of the safety valve is communicated with one end of the back pressure pipe, and the inlet of the back pressure valve is communicated with one end of the back pressure pipe;And, Buffer mechanism, the buffer mechanism includes energy storage tank and diaphragm, the diaphragm is fixed in the energy storage tank, to separate the inner chamber of the energy storage tank into energy storage chamber and buffer chamber, the energy storage chamber is communicated with the back pressure pipe, and the buffer chamber is filled with nitrogen.

2. The diaphragm pump overload protection device of claim 1, wherein, The inlet of the safety valve is fixed to the pressure relief port via a plurality of first fixed screws.

3. The diaphragm pump overload protection device of claim 1, wherein, The overload protection mechanism further includes connecting pipe, one end of the connecting pipe is communicated with the outlet of the safety valve, and the other end of the connecting pipe is communicated with one end of the back pressure pipe.

4. The diaphragm pump overload protection device of claim 3, wherein, The other end of the connecting pipe and one end of the back pressure pipe are fixedly connected via a plurality of fixed bolts.

5. The diaphragm pump overload protection device of claim 1, wherein, The diaphragm is rubber diaphragm.

6. The diaphragm pump overload protection device of claim 1, wherein, The buffer mechanism further includes fixing seat, limiting block and 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 arranged on the limiting block, the limiting hole is used to put 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 of claim 6, wherein, One end of the fixing seat is fixed to the shell via a plurality of second fixed screws.

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

9. The diaphragm pump overload protection device of claim 1, wherein, The overload protection mechanism further includes pressure gauge, and the pressure gauge is installed on the back pressure pipe.

10. The diaphragm pump overload protection device of claim 1, wherein, The back pressure pipe is fixed to the shell via a plurality of fourth fixed screws.

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