CN201184291Y

CN201184291Y - Slurry pump with improved safety device

Info

Publication number: CN201184291Y
Application number: CNU2008200456692U
Authority: CN
Inventors: 邱长春
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-03-31
Filing date: 2008-03-31
Publication date: 2009-01-21
Anticipated expiration: 2018-03-31

Abstract

The utility model relates to the technical field of pump equipment, in particular to a mud pump with an improved safety device. An overload pressure releasing device is arranged on an air chamber of a mud pump body and connected with an air-liquid switch valve arranged at the inlet end of the mud pump body through a duct. When an overpressure and overload fault occurs, the overload pressure releasing device is started to guide the pressure air in the air chamber to a piston cavity sealed by the air-liquid switching valve through the duct, the pressure air jacks up the piston to lift a sealing pad at the tail end of the piston, and the external air is sucked into the inlet end of the mud pump body through the opening and a sealed hole, so that the mud pump body cannot keep the original vacuum degree due to the external air sucked into the inlet end and stops pumping the mud. Accordingly, the mud pump can operate easily, and the compressed air of the mud pump has smaller pressure which cannot damage the parts. By adopting air as the medium, the mud pump can reduce the damage to the safety device as compared with the conventional mud pump adopting mud as the medium.

Description

Mud class pump with improvement safety installations

Technical field

The utility model relates to the pump apparatus technical field, refers in particular to the mud class pump with improvement safety installations.

Background technique

General mud class pump (comprising thick liquid pump classes such as output cement slurry, mortar) is equipped with air chamber 11 at the mud pump housing 1; as shown in Figure 1; air chamber 11 is the mud that the buffering mud pump housing 1 pumps; reach evenly mild effect of output; air chamber 11 connects output terminal 21; output terminal 21 operated by rotary motion have a safety valve 22; when breaking down the superpressure overload; the valve 23 of jack-up safety valve 22 made leaked liquid when system pressure surpassed the pressure of stipulating; exempt from superpressure with protection pump and systematic part and destroy, to be contained in output terminal 210 minutes necessary for this valve in theory.But in actual the use; because what carried is mud class medium. contain a large amount of clays and sand grains or stone flour etc.; such medium is very big to the valve 23 and valve seat 24 erosive wears of safety valve 22; valve 23 and valve seat 24 are easy to wearing and tearing; have a little wearing and tearing just produce to reveal, slight leakage goes out groove and lost efficacy in valve 23 and valve seat 24 surface erosions rapidly.Its two: safety valve 22 is in case open, and is stuck by sand and clay etc. easily, when reactivating pump, often to dismantle valve 23 and valve seat 24 so that clean, also need assemble up after the dismounting, the dismounting assembly manipulation of valve 23 and valve seat 24 is all very difficult, and the use to pump brings very burden like this; General smaller leakage can work on and can in time not go to handle, and needs just process after waiting and finishing this time work, make slurries constantly wash away valve 23 and valve seat 24 surfaces like this, make the very fast inefficacy of safety valve 22.Its three: after changing new several times valve 23 and valve seat 24, because replacing is loaded down with trivial details and expense is higher, in the real work, often no longer change valve 23 and valve seat 24 after changing several times, just use under the safety installations state having no: usually wash out the part phenomenon, as break through high-pressure rubber pipe etc., the bigger loss that brings thus; The mud that breaks through the high-pressure rubber pipe ejaculation also can constitute personal injury to the operator.

The model utility content

The purpose of this utility model is to overcome the deficiency that existing mud class pump safety installations exists, and a kind of mud class pump with improvement safety installations is provided.

To achieve these goals, the utility model adopts following technological scheme:

Mud class pump with improvement safety installations, it includes the mud pump housing, one overload pressure relief device is set on the air chamber of the mud pump housing, the overload pressure relief device connects a gas-liquid switching valve by a conduit and connects, the gas-liquid switching valve is installed in the entry end of the mud pump housing, and entry end is provided with the closed hole that connects the gas-liquid switching valve.

Wherein said gas-liquid switching valve includes piston and valve body, the piston activity is located in the valve body, piston and valve body are provided with the piston cavity of a sealing, piston cavity is provided with the suction port of connecting duct, the top of piston is provided with a drop handle, and the upper end of valve body is provided with a piston cap, is provided with a normal pressure spring between piston and the piston cap, the lower end of piston is provided with soft sealing gasket, and sealing gasket can closely touch closed hole; The lower end of valve body is provided with suction port, and valve body is welded on the top of the closed hole position of entry end.

Wherein said gas-liquid switching valve is provided with the bolt of through hole, through hole one end is communicated with the piston cavity of gas-liquid switching valve, the through hole exterior edge face is installed with the venting nut that an outer end is sealed by bolt, is provided with a sealing gasket between venting nut and bolt, and venting nut sidewall offers a vent hole.

Wherein said overload pressure relief device and air chamber joint are provided with a damping device, and the overload pressure relief device is the air unloading valve.

The ingress of pressure relief device in air chamber was provided with a guard in wherein said year.

The conduit of wherein said connection overload pressure relief device and gas-liquid switching valve is a metal catheter.

The beneficial effects of the utility model are: the mud class pump that the utlity model has the improvement safety installations, one overload pressure relief device is set on the air chamber of the mud pump housing, the overload pressure relief device connects a gas-liquid switching valve by a conduit and connects, and the gas-liquid switching valve is installed in the entry end of the mud pump housing; When breaking down the superpressure overload, when system pressure surpasses the pressure of pressure relief device setting, the overload pressure relief device is opened, pressed gas in the air chamber enters the piston cavity of gas-liquid switching valve sealing by conduit, pressed gas is with the piston jack-up that makes progress, the sealing gasket that drives piston end lifts, ambient atmosphere is sucked the entry end of the mud pump housing from closed hole by the perforate of the valve body of gas-liquid switching valve, suction has the entry end of ambient atmosphere to make the mud pump housing not keep due degree of vacuum, mud stops to suck immediately, the off-load of mud class pump, mud class pump operation is light, and the work of mud class pump at this moment only shows as pressurized air, and the pressure that pressurized air produces is little, can not cause the damage of part, go back the high pressure high load running after having avoided traditional mud class pump to stop up and cause parts depreciation, damage and other potential safety hazard.

Description of drawings

Fig. 1 is a prior art mud class pump structure schematic representation

Fig. 2 is a structural representation of the present utility model

Fig. 3 is the sectional view of gas-liquid switching valve of the present utility model

Fig. 4 is the sectional view of gas-liquid switching valve piston of the present utility model during by jack-up

Embodiment:

The utility model is described in more detail below in conjunction with accompanying drawing:

The mud class pump that shown in Fig. 2-4, has the improvement safety installations, it includes the mud pump housing 1, one overload pressure relief device 12 is set on the air chamber 11 of the mud pump housing 1, overload pressure relief device 12 connects a gas-liquid switching valve 14 by a conduit 13 and connects, gas-liquid switching valve 14 is installed in the entry end 15 of the mud pump housing 1, and entry end 15 is provided with the closed hole 151 that connects gas-liquid switching valve 14.

Gas-liquid switching valve 14 includes piston 18 and valve body 141, piston 18 activities are located in the valve body 141, piston 18 is provided with a piston cavity 142 that seals with valve body 141, piston cavity 142 is provided with the suction port 144 of connecting duct 13, the top of piston 18 is provided with a drop handle 20, and the upper end of valve body 141 is provided with a piston cap 143, is provided with a normal pressure spring 19 between piston 18 and the piston cap 143, the lower end of piston 18 is provided with soft sealing gasket 181, and sealing gasket 181 can closely touch closed hole 151; The lower end of valve body 141 is provided with suction port 144, and valve body 141 is welded on the top of closed hole 151 positions of entry end 15.

Gas-liquid switching valve 14 is provided with the bolt 16 of through hole 161, through hole 161 1 ends are communicated with the piston cavity 142 of gas-liquid switching valve 14, through hole 161 exterior edge faces are installed with the venting nut 17 of outer end sealing by bolt 16,

venting nut

17 and 16 on bolt are provided with a sealing gasket 171, and venting nut 17 sidewalls offer a vent hole 172; After fault is got rid of, when restarting mud class pump, unscrew venting nut 17 earlier, emit the air of 142 li of piston cavity, guarantee that the sealing gasket 181 of piston 18 bottoms of air inlet liquid switching valve 14 is closed under spring 19 effects.When if 151 of the closed holes of the sealing gasket 181 of gas-liquid switching valve 14 and entry end 15 have impurity such as sand grains, can rotate up and down by the drop handle 20 that piston 18 tops are provided with and carry several times, it is closed tightly, if be stained with foul on sealing gasket 181 and the closed hole 151, can wash or wipe out by water with hand, easy to operate simple, mention drop handle 20, water and silt particle etc. enter population end 18 from closed hole 151, and then screw venting nut 17; Simultaneously, open the casket valve of installing on the mud class pump output terminal 21 25, make the pressure of outlet system be able to whole releases, mud class pump restarts under the situation of load not having, the to-and-fro motion of mud class pump several times just can be the air emptying in the mud class pump, thereby sucts mud liquid, change normal working over to, avoided traditional mud class pump to need dismounting security device and the cleaning loaded down with trivial details work that brings like this.

Overload pressure relief device 12 is provided with a damping device 121 with air chamber 11 joints, and overload pressure relief device 12 is the air unloading valve; Damping device 121 makes overload pressure relief device 12 reliable and stable work, can not produce misoperation because of the fluctuation of the gas pressure in the air chamber 11; Air unloading valve moderate cost is provided with look nut on it by adjusting, can regulate pressure unloading.

The ingress of overload pressure relief device 12 in air chamber 11 is provided with a guard 122, prevents that the impurity of 11 li of air chambers from entering in overload pressure relief device 12 and the conduit 13.

The conduit 13 that connects overload pressure relief device 12 and gas-liquid switching valve 14 is a metal catheter, and present embodiment adopts the metallic copper conduit, metallic copper conduit good toughness, and compressive resistance is strong, is difficult for wrecking in moving handling process.

The utlity model has the mud class pump of improvement safety installations, one overload pressure relief device 12 is set on the air chamber 11 of the mud pump housing 1, overload pressure relief device 12 connects a gas-liquid switching valve 14 by a conduit 13, and gas-liquid switching valve 14 is installed in the entry end 15 of the mud pump housing 1; When breaking down the superpressure overload, when stopping up as output terminal 21, when system pressure surpasses the pressure of pressure relief device setting, overload pressure relief device 12 is opened, the pressed gas that air chamber is 11 li enters the piston cavity 142 of gas-liquid switching valve 14 sealings by conduit 13, pressed gas is with piston 18 jack-up upwards, the sealing gasket 181 that drives piston 18 ends lifts, ambient atmosphere is sucked the entry end 15 of the mud pump housing 1 from closed hole 151 by the perforate 31 of the valve body 141 of gas-liquid switching valve 14, suction has the entry end 15 of ambient atmosphere to make the mud pump housing 1 not keep due degree of vacuum, mud stops to suck immediately, the off-load of mud class pump, mud class pump operation is light, at this moment the work of mud class pump only shows as pressurized air, the pressure that the structure characteristics of mud class pump has determined pressurized air to produce is little, be generally about 0.3Mpa, do not reach the rated pressure of overload pressure relief device 12, can not cause the damage of part, go back the high pressure high load running after having avoided traditional mud class pump to stop up and cause parts depreciation, damage and other potential safety hazard; Soft sealing gasket 181 favorable sealing properties, long service life is difficult for causing revealing causing safety installations to lose efficacy; Whole safety installations, can not cause mud to enter safety installations and needs the trouble of disassembly, cleaning as a kind of security medium by air.

The above only is preferred embodiment of the present utility model; the utility model structure also is applicable to the safety protection device of high, medium and low voltage mud class pumps (pump classes such as cement slurry, mortar) such as twin-tub, three cylinders, multi-cylinder; so all equivalences of doing according to the described structure of the utility model patent claim, feature and principle change or modify, and are included in the utility model patent claim.

Claims

1. the mud class pump that has the improvement safety installations, it includes the mud pump housing (1), it is characterized in that: an overload pressure relief device (12) is set on the air chamber (11) of the described mud pump housing (1), overload pressure relief device (12) connects a gas-liquid switching valve (14) by a conduit (13) and connects, gas-liquid switching valve (14) is installed in the entry end (15) of the mud pump housing (1), and entry end (15) is provided with the closed hole (151) that connects gas-liquid switching valve (14).

2. the mud class pump with improvement safety installations according to claim 1, it is characterized in that: described gas-liquid switching valve (14) includes piston (18) and valve body (141), piston (18) activity is located in the valve body (141), piston (18) is provided with a piston cavity (142) that seals with valve body (141), piston cavity (142) is provided with the air inlet (144) of connecting duct (13), the top of piston (18) is provided with a drop handle (20), the upper end of valve body (141) is provided with a piston cap (143), be provided with a normal pressure spring (19) between piston (18) and the piston cap (143), the lower end of piston (18) is provided with soft sealing gasket (181), and sealing gasket (181) can closely touch closed hole (151); The lower end of valve body (141) is provided with suction port (144), and valve body (141) is welded on the top of closed hole (151) position of entry end (15).

3. the mud class pump with improvement safety installations according to claim 1, it is characterized in that: described gas-liquid switching valve (14) is provided with the bolt (16) of through hole (161), through hole (161) one ends are communicated with the piston cavity (142) of gas-liquid switching valve (14), through hole (161) exterior edge face is installed with the venting nut (17) of outer end sealing by bolt (16), be provided with a sealing gasket (171) between venting nut (17) and bolt (16), venting nut (17) sidewall offers a vent hole (172).

4. the mud class pump with improvement safety installations according to claim 1 is characterized in that: described overload pressure relief device (12) is provided with a damping device (121) with air chamber (11) joint, and overload pressure relief device (12) is the air unloading valve.

5. the mud class pump with improvement safety installations according to claim 1, it is characterized in that: the ingress of pressure relief device (12) in air chamber (11) was provided with a guard (122) in described year.

6. according to the described any mud class pump with improvement safety installations of claim 1-5, it is characterized in that: the conduit (13) of described connection overload pressure relief device and gas-liquid switching valve (14) is a metal catheter.