阅读说明：本技术 一种斜盘式阀配流高压消防泵 (Swash plate type valve flow distribution high-pressure fire pump ) 是由 不公告发明人 于 2021-01-13 设计创作，主要内容包括：本发明一种斜盘式阀配流高压消防泵是采用改良柱塞组件结构,在泵的作用力臂一定时可几倍增大柱塞做功面积或增加柱塞数量实现大幅度增加流量,降低功耗,提高运转平稳性,降低噪音,减少磨损和泄露,增强自吸能力,提高效率和使用寿命,并可防止频繁关枪对消防泵的冲击损坏；左右对称设计柱塞组件和斜盘组件,共用进出液单向阀和泵轴,提高了容积效率和总效率,实现了泵的作用力臂不变时可翻倍增加泵的流量,更好的满足了大流量高压细水雾消防泵高效、直联、紧凑、体积小、重量轻的要求。(The swash plate type valve flow distribution high-pressure fire pump adopts an improved plunger assembly structure, can increase the acting area of the plunger or increase the number of the plungers by several times at a certain moment of the acting arm of the pump to greatly increase the flow, reduce the power consumption, improve the operation stability, reduce the noise, reduce the abrasion and the leakage, enhance the self-priming capability, improve the efficiency and the service life, and prevent the fire pump from being damaged by impact when the gun is frequently closed; the plunger assembly and the swash plate assembly are designed in bilateral symmetry, the liquid inlet and outlet check valve and the pump shaft are shared, the volumetric efficiency and the total efficiency are improved, the pump flow can be doubled and increased when the acting force arm of the pump is unchanged, and the requirements of high efficiency, direct connection, compactness, small size and light weight of the high-flow high-pressure water mist fire pump are better met.)

1. The utility model provides a swash plate valve distribution high pressure fire pump which characterized in that: the improved plunger assembly structure is characterized in that a cylinder sleeve is arranged in a plunger hole of a pump body, a plunger is processed into a piston shape, one end of a reset spring sleeved on the plunger is arranged in a spring seat of a guide pressure plate, the other end of the reset spring is arranged in a spring chuck and fixed on the plunger through a clamp spring to abut against a swash plate, the plunger cylinder sleeve and the plunger hole of the pump body adopt interference fit, the swash plate rotates in work, the plunger is pushed to do reciprocating motion through the reset spring, a one-way valve for liquid inlet and outlet is opened and closed in sequence, liquid is sucked and discharged, and the liquid is pressurized.

2. The swash plate valve flow distribution high pressure fire pump of claim 1, wherein: the pump body or the pump cover is provided with a liquid inlet screw hole or a liquid outlet pipe of the pump, the liquid inlet screw hole or the liquid outlet pipe is respectively connected with a liquid inlet pipeline and a liquid outlet pipeline in the pump and is respectively communicated with a liquid through hole at the tail end of the cylinder body through a liquid inlet check valve and a liquid outlet check valve, the liquid inlet check valve and the liquid outlet check valve are axially arranged on one side or two sides of the pump body and the pump cover, and the liquid outlet pipeline is provided with a pressure regulating safety valve with a.

3. The swash plate valve flow distribution high pressure fire pump of claim 1, wherein: three or more improved plunger assemblies are adopted, and the number of the improved plunger assemblies is odd.

4. Another structure of a swash plate type valve flow distribution high pressure fire pump according to claim 1, wherein: the plunger assembly and the swash plate assembly are designed in bilateral symmetry, the plunger assembly and the swash plate assembly share the liquid inlet check valve and the liquid outlet check valve, the liquid inlet check valve and the liquid outlet check valve are axially and uniformly distributed along the circumference outside the cylinder sleeve, and one pump shaft and one prime motor are used.

5. The swash plate valve flow distribution high pressure fire pump of claim 1, wherein: the surface hardness of the plunger is greater than that of the cylinder sleeve, and hard alloy or ceramic material is plated/sprayed on the surface of the plunger.

6. The swash plate valve distribution high pressure fire pump plunger of claim 1, wherein: the plunger is of a hollow structure, an oil penetration hole is formed in the top of the plunger abutting against the swash plate, an oil injection screw hole is formed in the clamping groove, the plunger is screwed down by using a countersunk head screw after being filled with lubricating oil, and all the oil injection screw holes of the plunger are upward during installation.

7. The swash plate valve flow distribution high pressure fire pump of claim 1, wherein: the guide pressure plate is made of engineering plastics, and the pump body is made of one of engineering plastics, aluminum and aluminum alloy materials.

Technical Field

The invention relates to the technical field of fire fighting equipment, in particular to a swash plate type valve flow distribution high-pressure fire pump.

Background

With the popularization of high-rise buildings and the trend that high-pressure water mist fire extinguishing devices in the field of fire fighting become the development of the industry, the core of the high-pressure water mist fire extinguishing device, namely a high-pressure fire pump, becomes the key for restricting the development of the industry. In order to meet the requirement of a high-pressure fire pump with the pressure of 5-10 mpa, the conventional centrifugal pump needs to be connected in series in multiple stages to realize high pressure and extremely low efficiency; the diaphragm high-pressure pump is difficult to use above 5mpa due to the restriction of the strength of the diaphragm material, and has the problem of great efficiency reduction under high pressure; the cam/crankshaft plunger pump has low rotating speed, small flow, large volume and heavy weight, and is difficult to meet the requirements of fire-fighting equipment, particularly mobile fire-fighting equipment; the disc-flow-distribution swash plate type plunger pump has poor self-absorption capacity and is not suitable for being used for a medium with low viscosity and poor lubricating performance in the fire-fighting field; the existing car washer valve flow distribution swash plate plunger pump is only suitable for small flow short-time intermittent use and does not meet the requirements of large flow and long-time continuous work of fire-fighting equipment. With the wide application of water-based extinguishing agents and intensified water, the high-pressure pump of the mobile high-pressure water mist fire extinguishing device also has the characteristics of corrosion resistance, direct connection, high efficiency, compactness, small volume, light weight, maintenance-free property and the like.

The smaller the force arm of the swash plate to the plunger in the swash plate type valve flow distribution plunger pump structure is, the smaller the force moment is, the lower the power consumption is, the higher the running stability is, the smaller the noise is, the more compact the structure is, the small size is, the light weight is, and the requirements of a fire pump, particularly a mobile fire pump are met. The existing car washer valve flow distribution swash plate plunger pump has the problems that the plunger assembly structure restricts the increase of the area of a plunger at a certain time of an acting force arm, and the arrangement of a liquid inlet check valve and a liquid outlet check valve and the structure of a liquid through hole at the tail end of a cylinder body cause the volume efficiency of the pump to be low, the self-priming capability is not strong, and the like.

Disclosure of Invention

Aiming at the defects of the existing fire pump and the problems of the prior art, the invention provides the swash plate type valve flow distribution high-pressure fire pump, which can greatly increase the working area of a plunger or increase the number of the plungers to realize the purpose of greatly increasing the flow, reducing the power consumption, improving the operation stability and reducing the noise by utilizing the improved plunger assembly structure when a pump acting arm is fixed, thereby achieving the purposes of compact structure, small volume, light weight and meeting the fire-fighting requirement; the plunger guide structure of the guide pressure plate reduces the radial stress of the plunger assembly, and ensures the running stability of the pump and the specified requirements of noise; the cylinder sleeve is added, so that the processing precision of the cylinder body is ensured, the abrasion and the leakage are reduced, and the liquid inlet check valve and the liquid outlet check valve are axially arranged, so that the purposes of improving the volume efficiency, enhancing the self-absorption capacity and prolonging the service life are achieved; through bilateral symmetry design plunger subassembly and sloping cam plate subassembly, sharing business turn over liquid check valve and pump shaft improves volumetric efficiency and total efficiency, realizes the purpose that further increases substantially the flow when the pump action arm of force is unchangeable. The invention can meet the functional requirements of high pressure, large flow, high efficiency, corrosion resistance, direct connection, compactness, small volume, light weight, maintenance-free property and the like of a high-pressure fire pump.

In order to achieve the above purpose of the present invention, the technical scheme adopted by the present invention is as follows:

the improved plunger assembly structure is characterized in that a cylinder sleeve is arranged in a plunger hole of a pump body, the plunger is processed into a piston shape, and a guide pressure plate with a guide function not only has a positioning effect on the cylinder sleeve, but also has a guide effect on the plunger. One end of a reset spring sleeved on the plunger is arranged in a spring seat of the guide pressure plate and acts on the cross section of the cylinder sleeve, the other end of the reset spring is arranged in a spring chuck and fixed on the plunger through a clamp spring to abut against a swash plate, and the plunger cylinder sleeve is in interference fit with a plunger hole of the pump body. When the hydraulic pump works, the swash plate rotates to push the plunger to do reciprocating motion through the reset spring, the liquid inlet check valve and the liquid outlet check valve are opened and closed in sequence, liquid is sucked and discharged, and the liquid is pressurized.

The present invention employs three or more improved plunger assemblies, and it is further preferred that the number of the improved plunger assemblies is an odd number.

Further preferably, the surface hardness of the plunger is greater than that of the cylinder sleeve.

It is further preferred that the surface of the plunger is plated/sprayed with cemented carbide or a ceramic material.

Preferably, the plunger is of a hollow structure, so that the weight of the plunger is reduced, the power consumption is reduced, and the problems of uneven friction and greatly reduced service life of the horizontal pump caused by the action of gravity can be solved.

Preferably, the hollow plunger is provided with an oil penetration hole on the top of the plunger which is pressed against the swash plate, the clamping groove is internally provided with an oil injection screw hole, the plunger is screwed by a countersunk screw after being filled with lubricating oil, all the oil injection screw holes of the plunger are upward during installation, and the plunger is used for lubricating a friction surface pressed against the swash plate during reciprocating motion of the plunger.

It is further preferred that the guide pressure plate is made of engineering plastics, and the pump body is made of one of engineering plastics, aluminum and aluminum alloy materials.

The pump body or the pump cover is provided with a liquid inlet screw hole or a liquid outlet pipe of the pump, the liquid inlet screw hole or the liquid outlet pipe is respectively connected with a liquid inlet pipeline and a liquid outlet pipeline in the pump and is respectively communicated with a liquid through hole at the tail end of the cylinder body through a liquid inlet check valve and a liquid outlet check valve, the liquid inlet check valve and the liquid outlet check valve are axially arranged, and the liquid outlet pipeline is provided with a pressure regulating safety valve with a backflow device and is communicated with.

The other structure of the swash plate type valve flow distribution high-pressure fire pump is that a plunger assembly and a swash plate assembly are designed in bilateral symmetry, a liquid inlet check valve and a liquid outlet check valve and a pump shaft are shared, the liquid inlet check valve and the liquid outlet check valve are axially and uniformly distributed along the circumference outside a cylinder sleeve, and the pump shaft and a prime motor are adopted. The flow of the improved plunger component structure swash plate type valve flow distribution high-pressure fire pump can be doubled under the conditions that the acting force arm of the pump is unchanged, the stroke of the plunger is unchanged and the rotating speed is unchanged.

Drawings

The invention is further described below with reference to the accompanying drawings:

FIG. 1 is a schematic sectional view of a conventional plunger assembly of a valve-distributor swash-plate plunger pump of a car washer.

Fig. 2 is a schematic sectional view of the improved plunger assembly of the swash plate type valve flow distribution high-pressure fire pump according to the present invention.

FIG. 3 is a schematic cross-sectional view of the hollow plunger and lubrication structure of the improved plunger assembly of the present invention.

Fig. 4 is a schematic partial cross-sectional view of the pump head of the swash plate type valve distribution high-pressure fire pump of the invention.

FIG. 5 is a schematic sectional view of a pump head portion of a swash plate assembly and a plunger assembly of a swash plate type valve flow distribution high-pressure fire pump with a common liquid inlet and outlet check valve, wherein the plunger assembly and the swash plate assembly are designed in a bilateral symmetry manner.

In fig. 1-5, 1 snap spring, 2 spring chuck, 3 return spring, 4 guide pressure plate, 5 plunger, 6 cylinder sleeve, 7 pump plunger hole, 8 liquid outlet channel, 9 cylinder body end liquid through hole, 10 pump cover, 11 oil seepage hole, 12 oil injection screw hole, 13 countersunk head screw, 14 swash plate, 15 liquid inlet hole, 16 liquid inlet one-way valve, 17 liquid inlet and outlet channel, 18 liquid outlet one-way valve, 19 liquid outlet hole, 20 pump shaft.

As shown in figure 1, the plunger assembly of the existing car washer valve flow distribution swash plate plunger pump has the structure that a plunger 5 reciprocates in a plunger hole 7 of a pump body, a return spring 3 is sleeved outside a guide section of the plunger hole 7 of the pump body, and the increase of the acting area of the plunger is limited at a certain time when a pump acting force arm acts.

As shown in figure 2, the improved plunger assembly structure is that a cylinder sleeve 6 is arranged in a plunger hole 7 of a pump body, a plunger 5 is processed into a piston shape, and a guide pressure plate 4 with a guide function not only has a positioning function on the cylinder sleeve 6, but also has a guide function on the plunger 5. One end of a reset spring 3 sleeved on the plunger 5 is arranged in a spring seat of the guide pressure plate 4 and acts on the cross section of the cylinder sleeve 6, the other end of the reset spring is arranged in a spring chuck 2 and is fixed on the plunger 5 through a clamp spring 1 and is pressed against a swash plate 14, and the plunger cylinder sleeve 6 and the plunger hole 7 of the pump body are in interference fit. When the hydraulic pump works, the swash plate 14 rotates to push the plunger 5 to do reciprocating motion through the return spring 3, and the liquid inlet check valve and the liquid outlet check valve are opened and closed in sequence to suck and discharge liquid, so that the liquid is pressurized. When the acting force arm of the pump is unchanged, the plunger acting area of the improved plunger assembly structure pump is increased to 3 times of the original area, and then under the conditions that the acting force arm of the pump is unchanged, the plunger stroke is unchanged and the rotating speed is unchanged, the flow of the improved plunger assembly structure pump is increased to 3 times of the original area.

As shown in fig. 3, the plunger 5 is a hollow piston structure, the top of the plunger 5 abutting against the swash plate 14 is provided with an oil penetration hole 11, a screw hole 12 is provided in the slot, after being filled with lubricating oil, the plunger is screwed by a countersunk screw 13, all the plunger oil penetration holes 12 face upwards during installation, and the plunger 5 is lubricated against the friction surface of the swash plate 14 through the oil penetration hole 11 during reciprocating motion.

As shown in fig. 5, another structure of the swash plate type valve flow distribution high-pressure fire pump of the present invention is that a plunger assembly and a swash plate assembly are designed in bilateral symmetry, a liquid inlet check valve 16 and a liquid outlet check valve 18 are shared, liquid inlet and outlet channels 17 are shared and axially distributed along the outer circumference of a cylinder sleeve 6, and a pump shaft 20 and a prime motor are adopted. Under the conditions that the acting force arm of the pump is unchanged, the stroke of the plunger is unchanged and the rotating speed is unchanged, the flow of the swash plate type valve flow distribution high-pressure fire pump with the improved plunger assembly structure can be doubled.

The invention has the beneficial effects that:

1. the invention can greatly increase the working area of the plunger or increase the number of the plungers to realize the great increase of flow, reduce the power consumption, improve the operation stability and reduce the noise when the acting force arm of the pump is fixed, thereby having more compact structure, small volume and light weight and better meeting the requirements of fire fighting, particularly mobile fire fighting equipment; abrasion and leakage are reduced, efficiency is improved, and service life is prolonged; the pressure regulating safety valve with the backflow device can prevent the fire pump from being damaged by impact caused by frequent gun closing.

2. Hollow plunger and lubricating structure not only alleviate the weight of plunger, reduce the consumption, can eliminate the horizontal pump moreover and lead to the friction inhomogeneous because of the action of gravity, life greatly reduced problem.

3. Through bilateral symmetry design plunger subassembly and sloping cam plate subassembly, go into, go out liquid check valve and pump shaft jointly, improved volumetric efficiency and total efficiency, realized that pump effort arm further increases substantially the flow regularly, reduce the consumption, improve the operation stationarity, the noise reduction, and then the structure is compacter, and is small, light in weight, better satisfied the fire control requirement.

Detailed Description

The improved plunger assembly structure is characterized in that the inner diameter of a cylinder sleeve 6 is arranged in a plunger hole 7 of a pump bodyThe thickness is 2mm, and the length is 20 mm. The plunger 5 is processed into a piston shape, and the guide section is stillPiston for working sectionThe length of the guide section of the guide pressure plate 4 is 20mm, and the outer diameter of the reset spring 3 sleeved on the plunger 5One end is arranged in a spring seat of the guide pressure plate 4 and acts on the section of the cylinder sleeve 6, the other end is arranged in a spring chuck 2 and is fixed on a plunger 5 through a clamp spring 1 and is pressed against a swash plate 14, and the plunger acts with a moment of 20mm under the same pump actionOuter diameter of return springIn the case of (2), a cylinderThe inner diameter of the sleeve 6 can be increased toUnder the conditions that the angle of the swash plate 14 is unchanged, the acting force arm is unchanged, the stroke of the plunger 5 is unchanged and the rotating speed is unchanged, the flow of the improved plunger assembly structure pump is increased to 3 times of the original flow.

Under the condition that the parameters are unchanged, plunger assemblies and swash plate assemblies are designed in bilateral symmetry, a swash plate valve flow distribution high-pressure fire pump liquid inlet check valve 16 and a swash plate valve 18 sharing a liquid inlet check valve and a pump shaft are uniformly distributed along the outer circumference of the cylinder sleeve 6 in the axial direction, a liquid inlet channel 17 and a liquid outlet channel 17 are shared, and a pump shaft 20 and a prime motor are adopted. Under the conditions of unchanged acting torque, unchanged plunger stroke and unchanged rotating speed of the pump, the flow of the pump with the improved plunger component structure in the bilateral symmetry design can be doubled.

The principles and structures disclosed herein are illustrative of the principles and structures that enable one skilled in the art to make and use the invention. Any modifications to the principles and arrangements described herein which do not depart from the spirit or structural scope of the principles of the present invention are deemed to be within the scope and ambit of the invention.