阅读说明：本技术 柱塞泵液力端总成 (Plunger pump hydraulic end assembly ) 是由 魏福芝 于 2019-11-20 设计创作，主要内容包括：本发明涉及压裂泵,尤其涉及一种柱塞泵液力端总成,包括横向的阀箱,所述阀箱下端成排设置有多个进液口,所述进液口处设置有进口阀门组件,所述阀箱上端成排设置有多个出液口,所述出液口处设置有出口阀门组件,所述阀箱上设置有排出口,所述排出口与各出液口连通,所述排出口处设置有排出法兰,所述阀箱上还设置有泄压口,所述泄压口处设置有泄压阀法兰,所述阀箱侧面成排设置有多个柱塞穿装口,所述柱塞穿装口处设置有柱塞组件,所述出口阀门组件外端设置有出液口堵头,所述出液口堵头外端设置有压帽,所述出液口外端设置有压力检测装置,方便进行压力监测、工作稳定性高、密封性能高、使用寿命长。(The invention relates to a fracturing pump, in particular to a plunger pump hydraulic end assembly which comprises a transverse valve box, wherein a plurality of liquid inlets are formed in the lower end of the valve box in a row, inlet valve assemblies are arranged at the liquid inlets, a plurality of liquid outlets are formed in the upper end of the valve box in a row, outlet valve assemblies are arranged at the liquid outlets, discharge ports are formed in the valve box and communicated with the liquid outlets, discharge flanges are arranged at the discharge ports, pressure relief ports are further formed in the valve box and provided with pressure relief valve flanges, a plurality of plunger penetrating ports are formed in the side face of the valve box in a row, plunger assemblies are arranged at the plunger penetrating ports, liquid outlet valve assemblies are arranged at the outer ends of the outlet valve assemblies, pressure caps are arranged at the outer ends of the liquid outlets, a pressure detection device is arranged at the outer ends of the liquid outlets, high working stability, high sealing performance and long service life.)

1. The utility model provides a plunger pump hydraulic end assembly, includes horizontal valve box, valve box lower extreme in bank is provided with a plurality of inlets, inlet department is provided with inlet valve subassembly, valve box upper end in bank is provided with a plurality of liquid outlets, liquid outlet department is provided with outlet valve subassembly, be provided with the discharge port on the valve box, discharge port and each liquid outlet intercommunication, discharge port department is provided with the discharge flange, still be provided with the pressure release mouth on the valve box, pressure release mouth department is provided with the relief valve flange, valve box side in bank is provided with a plurality of plungers in row and wears to adorn the mouth, plunger is worn to adorn mouthful department and is provided with the plunger subassembly, outlet valve subassembly outer end is provided with the liquid outlet end cap, liquid outlet end cap outer end is provided with gland: the device comprises a liquid outlet, a liquid outlet plug, a pressure cap, a sensor pressing cap, a sensor plug, a supporting tube, a pressing ring, a sealing pad, a step, a strain plate, a strain sheet, a cable and a piston, wherein the outer end of the liquid outlet is provided with a pressure detection device, the liquid outlet plug is provided with a liquid passing hole, the position, corresponding to the liquid passing hole, on the pressing cap is provided with a through hole, the pressure detection device comprises the sensor plug arranged at the outer end of the liquid outlet, the sensor plug is connected with the sensor pressing cap, the outer wall of the lower end of the supporting tube is provided with the pressing ring matched with the sensor pressing cap, the outer side surface of the pressing ring is provided with the sealing ring, the inner wall of the lower end of the supporting tube is provided with, and a balance spring is arranged between the strain plate and the piston, and a stop ring for preventing the piston from separating is arranged at the lower end of the supporting tube.

2. The plunger pump fluid end assembly of claim 1, wherein: the inlet valve assembly and the outlet valve assembly respectively comprise a valve seat, the upper end surface of the valve seat is provided with a valve rubber sheet, a valve body is sleeved in the valve seat, the upper end of the valve body is provided with a return spring, and a valve seat O-shaped ring is sleeved outside the valve seat.

3. The plunger pump fluid end assembly of claim 2, wherein: the outer end of a return spring of the outlet valve assembly is arranged in the liquid outlet plug, and the inner end of the return spring of the inlet valve assembly is provided with a centering frame.

4. The plunger pump fluid end assembly of claim 1, wherein: the plunger subassembly includes the plunger, from outside-in cover in proper order on the plunger is equipped with packing pressure cap, oil blanket, oil ring, copper sheathing, presss from both sides cloth packing, rubber packing, guide ring, the plunger outer end is provided with the plunger clamp.

5. The plunger pump fluid end assembly of claim 4, wherein: the packing is pressed the cap outer end outer wall and is provided with annular slot, slot bottom evenly distributed has a plurality of ball grooves, the ball groove extends to the inner wall that the cap was pressed to the packing, be provided with the ball in the ball groove.

6. The plunger pump fluid end assembly of claim 1, wherein: and a side opening is arranged on the side wall of the valve box at a position opposite to the plunger penetrating opening.

7. The plunger pump fluid end assembly of claim 1, wherein: an elastic membrane is arranged between the sealing gasket and the supporting tube.

8. The plunger pump fluid end assembly of claim 1, wherein: and the upper end surface and the lower end surface of the strain plate are both fixed with support rings, and the support rings on the lower end surface of the strain plate are extruded with the balance spring.

9. The plunger pump fluid end assembly of claim 8, wherein: 3-4 downward limiting rods are uniformly arranged between the support ring on the lower end face of the strain plate and the piston, the upper end of each limiting rod is fixed with the support ring, and the piston is provided with a limiting hole matched with the limiting rod.

10. The plunger pump fluid end assembly of claim 1, wherein: the upper end of the supporting tube is provided with a step hole, a sealing ring is arranged at the step hole, and the outer edge of the upper end of the supporting tube is provided with a connecting ring.

Technical Field

The invention relates to a fracturing pump, in particular to a hydraulic end assembly of a plunger pump.

Background

The plunger pump is an important device of the hydraulic system. The plunger pump has the advantages of high rated pressure, compact structure, high efficiency, convenient flow regulation and the like, and is widely applied to occasions with high pressure, large flow and flow needing regulation, such as hydraulic machines, engineering machinery and ships.

In particular, in the operations of fracturing, cementing, sand prevention and acidification in oil fields, a large number of plunger pumps are used, and the commonly used plunger pumps are three-cylinder plunger pumps or five-cylinder plunger pumps, so that the power is high and the work is stable.

The existing plunger pump mainly comprises a driving motor, a gearbox and a hydraulic end, the hydraulic end of the existing five-cylinder plunger pump mainly comprises a transverse valve box, a plurality of liquid inlets are arranged at the lower end of the valve box in a row, an inlet valve component is arranged at the liquid inlet, a plurality of liquid outlets are arranged at the upper end of the valve box in a row, an outlet valve component is arranged at the liquid outlet, a discharge port is arranged on the valve box and is communicated with the liquid outlets, a discharge flange is arranged at the discharge port, a pressure relief port is also arranged on the valve box and is provided with a pressure relief valve flange, a plurality of plunger penetrating ports are arranged at the side face of the valve box in a row, a plunger component is arranged at the plunger penetrating port, a liquid outlet is arranged at the outer end of the outlet valve component, a pressure cap is arranged at the outer end of the, but because fracturing pump's transport medium cleanliness factor is low, and need monitor output pressure to guarantee job stabilization nature, usually through the pressure that detects the exit among the prior art, and then judge whether hydraulic end job stabilization, it is poor to detect the precision, and can not detect the pressure of every liquid outlet department in real time.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide the plunger pump hydraulic end assembly which is convenient for pressure monitoring, high in working stability, high in sealing performance and long in service life.

The invention is realized by the following technical scheme: a plunger pump hydraulic end assembly comprises a transverse valve box, wherein a plurality of liquid inlets are arranged at the lower end of the valve box in a row, inlet valve components are arranged at the liquid inlets, a plurality of liquid outlets are arranged at the upper end of the valve box in a row, outlet valve components are arranged at the liquid outlets, a discharge port is arranged on the valve box and is communicated with the liquid outlets, a discharge flange is arranged at the discharge port, a pressure relief port is further arranged on the valve box and is provided with a pressure relief valve flange, a plurality of plunger penetrating ports are arranged at the side face of the valve box in a row, a plunger component is arranged at the plunger penetrating port, a liquid outlet plug is arranged at the outer end of the outlet valve component, a pressure cap is arranged at the outer end of the liquid outlet plug, a pressure detection device is arranged at the outer end of the liquid outlet plug, a liquid passing hole is arranged in the, pressure measurement device is including setting up the sensor end cap in the liquid outlet outer end, the sensor end cap is connected with the sensor and presses the cap, the sensor end cap includes the stay tube, stay tube lower extreme outer wall is provided with presses cap assorted clamping ring with the sensor, the clamping ring lateral surface is provided with the sealing ring, stay tube lower extreme inner wall is provided with and presses the sealed pad of cap matched with, be provided with the step in the stay tube, step department is provided with the strainoplate, the strainoplate upper surface is provided with the foil gage, the foil gage is connected with the cable conductor, be provided with the piston in the stay tube, the piston is sealed with the stay tube inner wall, be provided with the ejector pin that is used for triggering the strainoplate on the piston, be provided with balance spring between strainoplate and.

Furthermore, the inlet valve assembly and the outlet valve assembly both comprise valve seats, valve rubber is arranged on the upper end faces of the valve seats, valve bodies are sleeved in the valve seats, return springs are arranged at the upper ends of the valve bodies, and valve seat O-shaped rings are sleeved outside the valve seats.

Furthermore, the outer end of a return spring of the outlet valve assembly is arranged in the liquid outlet plug, and the inner end of the return spring of the inlet valve assembly is provided with a centering frame.

Further, the plunger subassembly includes the plunger, from the outside inwards in proper order the cover be equipped with packing pressure cap, oil blanket, oil ring, copper sheathing, press from both sides cloth packing, rubber packing, guide ring on the plunger, the plunger outer end is provided with the plunger clamp.

Further, the outer wall of the outer end of the packing pressing cap is provided with an annular groove, a plurality of ball grooves are uniformly distributed at the bottom of the groove, the ball grooves extend to the inner wall of the packing pressing cap, and balls are arranged in the ball grooves.

Furthermore, a side opening is formed in the position, opposite to the plunger penetrating opening, of the side wall of the valve box.

Further, an elastic membrane is arranged between the sealing gasket and the supporting tube.

Furthermore, support rings are fixed on the upper end face and the lower end face of the strain plate, and the support rings on the lower end face of the strain plate are extruded with the balance spring.

Furthermore, 3-4 downward limiting rods are uniformly arranged between the support ring on the lower end face of the strain plate and the piston, the upper end of each limiting rod is fixed with the support ring, and the piston is provided with a limiting hole matched with the limiting rod.

Furthermore, a step hole is formed in the upper end of the supporting tube, a sealing ring is arranged at the step hole, and a connecting ring is arranged on the outer edge of the upper end of the supporting tube.

The invention has the beneficial effects that: the valve box is provided with a plurality of liquid inlets, liquid outlets and plunger penetrating ports, the liquid inlets are respectively provided with an inlet valve component, an outlet valve component and a plunger component, the power can be effectively improved, the working stability is high, the outer end of each liquid outlet is provided with a pressure detection device which can monitor the pressure at the liquid outlet so as to monitor the working condition of a hydraulic end, not only can multipoint monitoring be realized, but also the monitoring error can be reduced by calculating the average value of multipoint detection values, a supporting pipe, a strain plate, a strain gauge, a piston, an ejector rod and a balance spring are arranged, the hydraulic push piston acts, the strain plate is pushed by the ejector rod to deform, the strain gauge converts an electric signal generated by the deformation of the strain plate into an electric signal, the hydraulic pressure is obtained by conversion, the sealing ring and the sealing gasket are arranged so that the sealing can be ensured, the, because the compression coefficient of air itself is less, set up balance spring, can detect pressure under the shorter condition of piston travel, can avoid the pressure loss strake simultaneously, job stabilization nature is high, long service life.

Drawings

FIG. 1 is an exploded view of embodiment 1;

FIG. 2 is a schematic cross-sectional view of a valve box;

FIG. 3 is a schematic diagram of a packing gland structure;

FIG. 4 is a schematic cross-sectional view of a pressure detection device;

wherein: 1-valve box, 2-valve seat O-ring, 3-valve seat, 4-valve rubber, 5-valve body, 6-reset spring, 7-liquid outlet plug, 8-press cap, 9-plug seal, 10-guide ring, 11-rubber packing, 12-clamping packing, 13-copper sleeve, 14-oil ring, 15-oil seal, 16-plunger, 17-packing press cap, 18-righting frame, 19-side plug, 20-plunger clamp, 21-clamp screw, 22-discharge flange, 23-flange nut, 24-gasket, 25-stud bolt, 27-union seal, 28-pressure release valve flange, 29-seal ring, 30-support tube, 31-sensor press cap, 32-groove, 33-ball groove, 34-rotary hole, 35-rubber sealing gasket, 36-liquid-permeable hole, 37-sealing ring, 38-sealing gasket, 39-elastic membrane, 40-blocking ring, 41-piston, 42-ejector rod, 43-limiting rod, 44-balance spring, 45-strain plate, 46-supporting ring, 47-strain sheet, 48-cable, 49-connecting ring, 50-liquid inlet, 51-liquid outlet, 52-discharge port, 53-side opening, 54-oil filling hole, 55-plunger penetrating opening and 56-pressing ring.

Detailed Description

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.