CN217152278U - Hydraulic end of plunger pump - Google Patents

Abstract

The utility model discloses a plunger pump hydraulic end, a drain hole arranged at the bottom of a box body of the hydraulic end is sequentially connected with a drain pipe, a sewage recovery pipe of the plunger pump and a sewage circulating pool, and a modified filler is also arranged in a filler box shell; an overflow leading pipe and a cooling water supply pipe are arranged in the stuffing box shell; a cooling water supply main valve in the stuffing box cooling and lubricating process is connected with a pump inlet pipeline, and a cooling water supply pipe arranged in a stuffing box shell in each hydraulic end box body in the plunger pump is respectively connected with a pressure measuring valve provided with a pressure gauge in the stuffing box cooling and lubricating process; and an induction transmitter is also fixed at the bottom of the outer wall of the crankcase in the hydraulic end box and is wirelessly connected with a converter in an electric control cabinet of the water injection pump room. The utility model discloses can ensure that the very first time after the equipment breaks down reports to the police, automatic pump stopping protection, has promoted the use of plunger pump to automatic, information-based, intelligent direction development, has apparent result of use.

Description

Hydraulic end of plunger pump

Technical Field

The utility model relates to a plunger pump's fluid end, especially plunger pump fluid end.

Background

In the process of oil field exploitation, oil field flooding is an important means for improving the oil field development level and maintaining the oil reservoir energy, and is one of the main measures for ensuring the stable oil field yield. The plunger type water injection pump is one of important mechanical equipment in oil exploitation, plays a crucial role in a water injection exploitation process, is widely applied to water injection, polymer injection and steam injection systems of oil fields, and has great influence on oil exploitation efficiency and exploitation quantity. The sealing between the high-pressure liquid in the plunger pump and the moving plunger is mainly carried out by the stuffing box assembly.

At present, a plunger pump stuffing box assembly is used, a copper pressing sleeve is extruded by a pressing cover, the copper pressing sleeve compresses a packing or a sealing element, and the packing is tightly connected with a plunger working surface after being extruded and expanded to play a role in sealing. Because the plunger piston is closely contacted with the filler, when the filler and the plunger piston are worn, the liquid leaks from the gap between the plunger piston and the filler, and a certain cooling and lubricating effect is achieved. However, with the high-speed reciprocating motion, the plunger and the packing generate violent friction, partial scraps can be generated, the scraps and impurities in the liquid are brought into a sealing surface between the packing and the plunger together, and the phenomenon of puncture occurs quickly.

In order to solve the above problems, the following related patent technologies are available at the production site:

through the retrieval, lubricated formula plunger pump packing box assembly, patent application number: 201720011510.8, this novel lubricated formula plunger pump stuffing box assembly includes: the device comprises a body, a positioning boss, an adjusting nut, a pressing sleeve, a screw, a lubricating screw hole, a plunger hole, an adjusting hole, an outer annular groove, an oil passage and an inner annular groove; four uniformly distributed trapezoidal positioning bosses are arranged along the periphery of the left end of the body, external threads matched with the adjusting nut are arranged at the right end of the body, and the body is sleeved in an inner cavity of the right end of the body in a pressing manner and is tightly pressed by the adjusting nut; the axis of the adjusting nut is provided with a round adjusting nut, six adjusting holes are arranged along the periphery, six lubricating screw holes communicated with the adjusting nut are arranged on the same axis at the left end of each adjusting hole, and the lubricating screw holes are matched with the screws; the left end of the inner cavity of the pressing sleeve is provided with an inner annular groove, the step part of the right end of the inner cavity of the pressing sleeve is provided with an outer annular groove, and an oil passage communicated with the inner cavity of the pressing sleeve is arranged along the bottom of the outer annular groove. The abrasion of the fragments to packing and a plunger is reduced, the effects of lubrication and cooling are achieved, the replacement period of the packing is prolonged, the material consumption is reduced, and the running rate of the pump is improved.

The following drawbacks still exist: the device mainly relies on lubricated screw to lubricate, and uses traditional filler still to produce the piece, produces the piece with the motion and sends into the recess that gets into the pressure cover front end in, but has hidden danger, reduces the life and the efficiency of equipment.

The utility model provides a plunger pump stuffing box is prevented leaking and anti-drop by liquid seal formula, application number 202020296894.4, plunger pump stuffing box is prevented leaking and anti-drop by liquid seal formula mainly has the stuffing box casing, sluicing groove, guide joint, overflow lead pipe, pump head, square pressure disk, filler, water seal ring, non-metallic sealing ring, packing gland, stuffing box pressure cap, plunger etc. and constitutes. A skeleton-type annular support body water seal ring is added in the stuffing box, and an annular space is formed between the skeleton-type annular support body water seal ring and the plunger. The corresponding position of the stuffing box wall and the water seal ring is additionally provided with a threaded hole, a guide joint and an overflow guide pipe. The liquid is stored in the annular space at the water seal ring, and plays a role in cooling and lubricating the filler and the plunger. After the liquid at the water seal ring is fully stored, the liquid flows out through the overflow guide pipe, so that the leakage condition of the filler can be conveniently and remotely seen by using a video. The bottom of the packing is additionally provided with a non-metal sealing ring, and a shallow thread curve is arranged on the contact surface of the packing and the plunger to form labyrinth seal, so that falling packing fragments are prevented from entering a liquid flow.

The following drawbacks remain: the stuffing box pressing cap is matched and fastened with a screw thread which is screwed in the outer wall of the stuffing box, the width size of the stuffing box pressing cap is large, and when the conditions such as corrosion, plunger pump vibration and the like occur, the phenomenon that the stuffing box pressing cap is inverted and loosened is easy to occur, and the stuffing box pressing cap and a plunger connecting clamp in motion collide easily, so that equipment is damaged. In addition, the bottom of the box body at the hydraulic end is provided with a drain pipe, the produced water is very easy to be alkaline to generate scale, so that a drain hole is blocked, if the produced water is not found in time, water accumulation is caused, and when the liquid level rises to the oil seal, lubricating oil in the crankshaft box body enters water, so that the lubricating oil is deteriorated, and the equipment is overhauled or scrapped. The device can only utilize the water injection pump operational aspect of video remote monitoring, after equipment breaks down, can't report to the police and the protection of automatic pump stopping. The service life of the filler is short, and filler fragments are easy to fall off, so that the sealing of a pump valve is not tight, and the pump efficiency is reduced.

Therefore, the hydraulic end of the plunger pump is urgently needed to be improved in a production field, the problem that the filler and the plunger in the plunger pump cannot be cooled and lubricated is solved, and the problems that the service life of the filler of the plunger pump is short and the leakage amount is large are solved.

Disclosure of Invention

The utility model aims at providing a plunger pump fluid end for packing in the packing box assembly and plunger provide cooling and lubricating function, solve present plunger pump packing life shorter, the big problem of thorn leakage, solve the harm that ponding caused in the fluid end box simultaneously, protect production equipment, reduction in production cost improves automatic management level, reduces workman's intensity of labour.

The technical solution of the utility model is that:

the utility model provides a plunger pump hydraulic end includes the stuffing box assembly, and the stuffing box assembly is equipped with stuffing box casing and conventional filler, and conventional filler is installed in the stuffing box casing, is equipped with the overflow induction pipe in the stuffing box casing, and the wash port that hydraulic end bottom half set up is connected with the sewage recovery pipe and the sewage circulation pond of drain pipe, plunger pump in proper order, wherein: the stuffing box shell is also internally provided with a modified stuffing; a cooling water supply pipe is arranged in the stuffing box shell; a cooling water supply main valve in the stuffing box cooling and lubricating process is connected with a pump inlet pipeline, and a cooling water supply pipe arranged in a stuffing box shell in each hydraulic end box body in the plunger pump is respectively connected with a pressure measuring valve provided with a pressure gauge in the stuffing box cooling and lubricating process; and an induction transmitter is also fixed at the bottom of the outer wall of the crankcase in the hydraulic end box and is wirelessly connected with a converter in an electric control cabinet of the water injection pump room.

The stuffing box cooling and lubricating process is provided with a cooling water supply main valve, a cooling water pipeline, an anti-filling check valve and a pressure gauge; the number of the anti-filling check valves and the pressure gauges corresponds to the number of the hydraulic ends of the plunger pump, and the cooling water supply pipe is correspondingly connected with the pressure gauges; the anti-filling check valve is installed in the cooling water line behind the cooling water supply main valve and in front of the hydraulic end of the plunger pump.

The pressure gauge is an electric contact pressure gauge, can be in wireless connection or wired connection with a converter in an electric control cabinet in the water injection pump room and can send the acquired working condition signals of the filler to a central control room through the converter in the electric control cabinet of the water injection pump room; the valve seat of the anti-filling check valve connected in the cooling water pipeline is positioned on one side of the cooling water supply main valve; the alarm pressure setting value of the pressure gauge is higher than the conveying pressure of the inlet pipeline of the pump.

The cooling water supply pipe and the overflow guide pipe are respectively in threaded connection with guide joints fixed on two sides of the stuffing box shell; the pipe body of the overflow leading pipe is also provided with an overflow regulating valve.

A water seal ring is arranged in the stuffing box shell corresponding to the cooling water supply pipe and the overflow leading pipe, the water seal ring is a circular groove body, the outer wall of the circular groove body is provided with a liquid flow hole, and the water seal ring is sleeved outside the plunger piston through a central hole; and a water storage groove is formed in the inner wall of the stuffing box shell corresponding to the water seal ring, and a water collecting tank is formed by the water storage groove and the spaces on two sides of the water seal ring.

The external thread of the lower portion of the stuffing box gland at the front end of the stuffing box shell is connected with the internal thread at the front portion of the stuffing box shell, and a hook wrench fastening hole is further formed in the outer wall of the stuffing box gland.

And conventional packing is arranged in the stuffing box shell in front of the water seal ring, modified packing is arranged in the stuffing box shell behind the water seal ring, and a front guide ring and a rear guide ring are respectively arranged at two ends of the modified packing between the water seal ring and the bottom of the stuffing box shell.

The reshaping filler is a disc-shaped body provided with a central hole and a V-shaped groove, the V-shaped groove enables the longitudinal section of the reshaping filler to be Y-shaped, and the reshaping filler can be stacked together; the front end of the front guide ring is a plane, and the structure of the rear end of the front guide ring is consistent with that of the front end of the reshaping filler; the rear end of the rear guide ring is a plane, the front end of the rear guide ring is provided with a conical table, and the structure of the front end of the rear guide ring is consistent with that of the rear end of the modified filler; the front guide ring can be laminated with the reshaping packing and the rear guide ring in the stuffing box shell.

The utility model provides a plunger pump hydraulic end includes the stuffing box assembly, and the stuffing box assembly is equipped with the stuffing box casing, is equipped with the overflow induction pipe in the stuffing box casing, and the wash port that hydraulic end bottom half set up is connected with the sewage recovery pipe and the sewage circulation pond of drain pipe, plunger pump in proper order, wherein:

labyrinth packing and modified packing are arranged in the packing box shell;

a cooling water supply main valve in the stuffing box cooling and lubricating process is connected with a pump inlet pipeline, and an overflow lead pipe arranged in a stuffing box shell in each hydraulic end box body in the plunger pump is respectively connected with a pressure measuring valve provided with a pressure gauge in the stuffing box cooling and lubricating process;

and an induction transmitter is also fixed at the bottom of the outer wall of the crankcase in the hydraulic end box and is wirelessly connected with a converter in an electric control cabinet of the water injection pump room.

The labyrinth packing is arranged in the stuffing box shell between the front surface of the water seal ring and the stuffing box gland, the modified packing is arranged in the stuffing box shell behind the water seal ring, and the front guide ring and the rear guide ring are respectively arranged at the two ends of the modified packing between the water seal ring and the bottom of the stuffing box shell.

The external thread at the lower part of the stuffing box gland at the front end of the stuffing box shell is connected with the internal thread at the front part of the stuffing box shell, and the outer wall of the stuffing box gland is also provided with a hook head wrench fastening hole; and processing a toothed curve on the surface of the central hole of the gland of the stuffing box to form labyrinth lines.

Compared with the prior art, the utility model discloses a show the result of use and lie in:

the utility model discloses mainly use in oil field water injection system field, also can use in the field of annotating application plunger pump delivery liquid such as vapour, notes gather, be particularly useful for the use of unmanned on duty's pump station after the information-based construction.

The utility model discloses work safe and reliable utilizes the packing box cooling and lubrication flow, for packing and plunger have increased cooling and lubricated function, can prolong the life of packing and plunger, reduces the maintenance and the change number of times of plunger and packing. The utility model discloses the body that well adopted has the reform transform filler of "V" type slot, and it is good from moist, the coefficient of resilience is high, avoids clastic production, and sealing performance is good, can effectively reduce the leakage of plunger pump, prevents that the crankcase from intaking, guarantees the quality of lubricating oil. After the structure of the stuffing box pressing cap is improved, the stuffing box pressing cap can be screwed in the stuffing box shell by utilizing threads, so that the stuffing can be directly compressed, and the installation position of the water seal ring is not influenced.

The utility model discloses increased the water seal ring in the packing box assembly, had great annular space between water seal ring and the plunger, usable cooling water circulation carries out automatic cooling and lubrication to the plunger. The pressure gauge is an electric contact pressure gauge, and the information remote transmission alarm function is realized. The labor intensity of workers is reduced, and the operation rate of the equipment is improved.

The utility model discloses utilize the condition of induction transmitter response filler leakage and ponding to report to the police and stop the pump automatically, solved the drain pipe at fluid end bottom half because wash port that incrustation scale etc. caused blocks up, the lubricating oil scheduling problem that ponding leads to is rotten, protected production facility, reduced manufacturing cost.

The utility model discloses be equipped with two kinds of embodiments, the homoenergetic improves the pump efficiency, has improved the intact rate of equipment simultaneously, the operation time rate, ensures steady water injection, has reduced material and equipment maintenance cost. The automatic control system can ensure the first time alarm and automatic pump stop protection after the equipment breaks down, promotes the use of the plunger pump to develop towards the direction of automation, informatization and intellectualization, and has remarkable use effect.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural diagram of the present invention.

FIG. 2 is a schematic diagram of a first embodiment of the stuffing box assembly of FIG. 1.

FIG. 3 is a schematic structural view of a second embodiment of the stuffing box assembly of FIG. 1.

Fig. 4 is a schematic structural diagram of the cooling and lubricating process of the present invention.

Fig. 5 is a schematic structural view of the front guide ring in fig. 2 and 3.

Fig. 6 is a schematic structural view of the modified packing of fig. 2 and 3.

Fig. 7 is a schematic structural view of the rear guide ring of fig. 2 and 3.

In the figure: 1-a plunger; 2-a stuffing box pressing cap; 3-overflow leading pipe; 4-overflow regulating valve; 5-a guide joint; 6-stuffing box housing; 7-square pressure plate fixing screws; 8-square pressure plate; 9-fastening hole of hook wrench; 10-a front guide ring; 11-water seal ring; 12-cooling the water supply pipe; 13-a water collecting tank; 14-a modified filler; 15-rear guide ring; 16-a crankcase; 17-connecting rod; 18-plunger connection card; 19-a hydraulic end tank body; 20-a pump head; 21-an inductive transmitter; 22-a drain hole; 23-a drain pipe; 24-a check valve; 25-electric contact pressure gauge; 26-pump outlet line; 27-cooling water supply main valve; 28-pump inlet line; 29-a sewage recovery pipe; 30-a sewage circulating tank; conventional packing 31, labyrinth packing 32.

Detailed Description

The drawings are for reference and illustration purposes only and are not intended to limit the scope of the present disclosure. The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention 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 merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In addition, in the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

The utility model has two implementation modes

Implementation mode one

Referring to fig. 1, 2, 4, 5, 6 and 7, a plunger pump hydraulic end comprises a stuffing box assembly, the stuffing box assembly is provided with a stuffing box shell 6 and a conventional stuffing 31, the conventional stuffing 31 is installed in the stuffing box shell 6, an overflow lead pipe 3 is arranged in the stuffing box shell 6, a drain hole 22 arranged at the bottom of a hydraulic end box 19 is sequentially connected with a drain pipe 23, a sewage recovery pipe 29 of the plunger pump and a sewage circulation tank 3, wherein:

the stuffing box shell 6 is also internally provided with a modified stuffing 14;

a cooling water supply pipe 12 is arranged in the stuffing box shell 6;

a cooling water supply main valve 27 in the stuffing box cooling and lubricating process is connected with a pump inlet pipeline 28, and a cooling water supply pipe 12 arranged in a stuffing box shell 6 in each hydraulic end box body 19 in the plunger pump is respectively connected with a pressure measuring valve provided with a pressure gauge 25 in the stuffing box cooling and lubricating process;

an induction emitter 21 is further fixed at the bottom of the outer wall of the crankcase 16 in the hydraulic end box body 19, and the induction emitter 21 is wirelessly connected with a converter in an electric control cabinet of the water injection pump room.

The utility model discloses in, packing assembly and crankcase 16 are all installed in fluid end box 19, and the pole 17 that connects in plunger 1 that is arranged in the packing assembly passes through plunger connector card 18 and crankcase 16 is connected, and the packing assembly in the plunger pump fluid end is fixed at the front end of pump head 20 through square pressure dish 8 and square pressure dish fixing bolt 7, and the sewage that drips in the overflow lead pipe 3 is connected to the sewage recovery pipe 29 of plunger pump through the wash port 22 and the drain pipe 23 of fluid end box 19 bottom and is drawn in the sewage circulation pond 30. The utility model discloses utilize the packing box cooling and lubrication flow effectively to prolong conventional filler 31 and the life and the work efficiency that reshape filler 14 and plunger 1. The water in the cooling water supply pipe 12 in the stuffing box shell 6 can provide lubrication for the conventional stuffing 31, the modified stuffing 14 and the plunger 1 in the stuffing box shell 6, a cooling water supply main valve 27 in the stuffing box cooling and lubricating process is connected in a pump inlet pipeline 28, and the cooling water supply pipe 12 installed in the stuffing box shell 6 in each hydraulic end box body 19 in the plunger pump is respectively connected with a pressure measuring valve provided with a pressure gauge 25 in the stuffing box cooling and lubricating process, so that the observation and the timely maintenance of the working states of the modified stuffing 14 and the plunger 1 are facilitated.

The inductive transmitter 21 can wirelessly transmit the measured sewage information at the bottom of the hydraulic end tank body 19 to a converter in the electric control cabinet of the water injection pump room and transmit the sewage information to the central control room through the converter. If the drainage hole 22 is blocked, when the depth of the sewage dropping to the bottom of the hydraulic end box body 19 of the overflow drainage pipe 3 reaches the induction transmitter 21, alarm information can be transmitted to the central control room, and the sewage can be cleaned in time. The problem that the lubricating oil is deteriorated due to the fact that water accumulated in the hydraulic end box body 19 enters the crankcase 16 can be prevented. When the accumulated water is not dredged in time, the water level of the accumulated water reaches the set position of the induction transmitter 21, and the control cabinet automatically stops the pump after receiving the signal.

The stuffing box cooling and lubricating process is provided with a cooling water supply main valve 27, a cooling water pipeline, an anti-filling check valve 24 and a pressure gauge 25; the number of the anti-filling check valves 24 and the pressure gauges 25 corresponds to the number of the hydraulic ends of the plunger pump, and the cooling water supply pipe 12 is correspondingly connected with the pressure gauges 25; the anti-backflow check valve 24 is installed in the cooling water line behind the cooling water supply main valve 27 and in front of the hydraulic end of the plunger pump. The cooling water supply main valve 27, the cooling water supply pipe 12, the cooling water pipeline, the anti-filling check valve 24 and the pressure gauge 25 form a stuffing box cooling and lubricating process. The cooling water enters the stuffing box assembly to cool and lubricate the conventional stuffing 31, the modified stuffing 14 and the plunger 1, and the cooled and lubricated water drops to the water drain hole 22 and the water drain pipe 23 at the bottom of the hydraulic end box body 19 through the overflow guide pipe 3 to be connected to the sewage recovery pipe 29 of the plunger pump and is guided to the sewage circulating pool 30.

The pressure gauge 25 is an electric contact pressure gauge, the pressure gauge 25 can be in wireless connection or wired connection with a converter in an electric control cabinet in the water injection pump room, and collected working condition signals of the filler can be sent to a central control room through the converter in the electric control cabinet of the water injection pump room.

The valve seat of the anti-backflow check valve 24 connected in the cooling water line is positioned at one side of the cooling water supply main valve 27; the alarm pressure setting of the pressure gauge 25 is higher than the delivery pressure of the pump inlet line 28. The anti-backflow check valve 24 prevents high pressure fluid in the pump from flowing back into the pump inlet line 28, and if the set pressure of the cooling water main supply valve 27 is exceeded, the valve ball in the anti-backflow check valve 24 blocks the valve seat to prevent high pressure fluid in the pump from entering the pump inlet line 28. The stuffing box cooling and lubricating process consists of a cooling water supply main valve 27, a cooling water pipeline and a flow dividing process of each plunger pump hydraulic end, a check valve 24 and a pressure gauge 25 are arranged in the flow dividing process of each plunger pump hydraulic end, and the check valve 24 can prevent high-pressure liquid leaked by the plunger pump from flowing into a pump inlet pipeline 28 through the flow dividing process of the plunger pump hydraulic end. Observing the pressure change of the pressure gauge 25 provided for each fluid end of the plunger pump, the operating conditions of the conventional packing 31 and the modified packing 14 therein can be judged. When the pressure gauge 25 sends an alarm signal in the set alarm threshold range in the shunting process of the hydraulic end of the plunger pump, the alarm signal is accessed into the central control chamber, the shunting process pressure of the hydraulic end is higher than the alarm threshold range, namely, the corresponding reshaping filler 14 in the hydraulic end of the plunger pump fails and is punctured, at the moment, an alarm is sent out in the central control chamber, and alarm information is popped up, so that unattended operation of a station warehouse is facilitated, and a manager organizes manpower to replace the reshaping filler 14 after remotely receiving the information.

The cooling water supply pipe 12 and the overflow leading pipe 3 are respectively in threaded connection with guide joints 5 fixed on two sides of the stuffing box shell 6; an overflow regulating valve 4 is also arranged in the pipe body of the overflow guiding pipe 3, and the regulating valve 4 is arranged at the lower part of the overflow guiding pipe 3, so that the water quantity of the overflowed water can be regulated and controlled. The overflow guiding pipe 3 is a universal adjusting pipe, and the direction in the stuffing box shell 6 can be adjusted at will.

A water seal ring 11 is arranged in the stuffing box shell 6 corresponding to the cooling water supply pipe 12 and the overflow leading pipe 3, the water seal ring 11 is a circular groove body, the outer wall of the circular groove body is provided with a liquid flow hole, and the water seal ring 11 is sleeved outside the plunger 1 through a central hole; the inner wall of the stuffing box shell 6 corresponding to the water seal ring 11 is provided with a water storage groove, and the water storage groove and the space at the two sides of the water seal ring 11 form a water collecting tank 13. And starting the plunger pump according to the operation specification, opening a cooling water supply main valve 27 in the cooling and lubricating process of the stuffing box, enabling the cooling water to enter a water seal ring 11 in the stuffing box assembly through a cooling water supply pipe 12, enabling part of water to stay in a water collecting tank 13 and lubricate the plunger 1, and enabling part of water to flow out of an overflow leading pipe 3.

The external thread of the lower part of the stuffing box gland 2 at the front end of the stuffing box shell 6 is connected with the internal thread at the front part of the stuffing box shell 6, and the outer wall of the stuffing box gland 2 is also provided with a hook wrench fastening hole 9. The utility model discloses changed the connected mode of gland 2 and gland casing 6, with the lower part of gland 2 and the anterior female connection of gland casing 6, gland 2 passes through the screw thread and is connected the back with gland casing 6, can directly compress tightly the filler 14 of reforming, more is favorable to compressing tightly of the filler 14 of reforming, does not influence the mounted position of water seal ring 11 simultaneously. The stuffing box pressing cap 2 is made of copper alloy material, so that the situation of thread corrosion damage can be avoided. The outer wall of the stuffing box gland 2 is provided with a hook head wrench fastening hole 9, so that the stuffing box gland 2 is convenient to mount and dismount.

The stuffing box housing 6 in front of the water seal ring 11 is filled with a conventional stuffing 31, the stuffing box housing 6 behind the water seal ring 11 is filled with a modified stuffing 14, and the two ends of the modified stuffing 14 between the water seal ring 11 and the bottom of the stuffing box housing 6 are respectively filled with a front guide ring 10 and a rear guide ring 15.

The modified filler 14 is a disc-shaped body provided with a central hole and a V-shaped groove, the V-shaped groove enables the longitudinal section of the modified filler 14 to be Y-shaped, and the modified filler 14 can be stacked together; the front end of the front guide ring 10 is a plane and the structure of the rear end is consistent with the structure of the front end of the modified packing 14; the rear end of the rear guide ring 15 is a plane, the front end of the rear guide ring 15 is provided with a conical table, and the structure of the front end of the rear guide ring 15 is consistent with that of the rear end of the modified packing 14; the front guide ring 10 can be laminated with the reshaped packing 14 and the rear guide ring 15 in the stuffing box housing 6. The front end of the modified packing 14 is provided with a boss, and the rear end of the modified packing 14 is formed by a V-shaped groove to form a central frustum and an outer ring inclined wall, so that the modified packing 14 can be tightly laminated with the front guide ring 10 and the rear guide ring 15. The modified packing 14 with the V-shaped grooves is adopted, so that the self-moistening type plunger pump is good in self-moistening property, high in resilience coefficient and good in sealing performance, leakage of the plunger pump can be effectively reduced, and the sealing effect is better.

Used the utility model discloses a plunger pump, after starting the plunger pump according to the operation rules, liquid in the pump inlet pipeline 28 will be carried through plunger pump hydraulic end and pump outlet pipeline 26. At this time, a cooling water supply main valve 27 of the stuffing box cooling and lubricating process is opened, cooling water enters the water seal ring 11 in the stuffing box housing 6 through a cooling water supply pipe 12, part of the water stays in the water collecting tank 13 and lubricates the plunger 1, part of the water flows out of the overflow water guide pipe 3, the size of the outflow water is adjusted through the overflow adjusting valve 4, and the pressure value of the pressure gauge 25 is observed to be the same as the conveying pressure of the pump inlet pipeline 28, so that the outflow water is kept in a balanced state. When the plunger 1 moves forwards, the notch behind the modified packing 14 with the V-shaped groove is opened, so that high-pressure water is prevented from escaping; when the plunger 1 moves backwards, the notch behind the modified packing 14 is closed, cooling water can be brought in, and the plunger 1 is cooled. When the pressure value of the pressure gauge 25 is greater than the conveying pressure of the pump inlet pipeline 28, the deformed filler 14 is indicated to be invalid, under the action of the check valve 24, high-pressure liquid in a hydraulic end of the plunger pump with leakage can be prevented from flowing into a filler box cooling and lubricating process, meanwhile, the pressure gauge 25 sends an alarm signal, the alarm signal is sent to a central control room through a converter in a control cabinet, and an organizer replaces the deformed filler 14.

When a water drainage hole 22 in the hydraulic end box body 19 is blocked due to scaling and the like, and water is accumulated or the modified filler 14 leaks, an alarm signal is sent to a central control room through the induction transmitter 21, so that an organizer can replace the modified filler 14 or dredge the water drainage hole 22; when the fault can not be cleared on site, the induction transmitter 21 automatically stops the plunger pump according to a set program.

Second embodiment

Referring to fig. 3, 4, 5, 6 and 7, the plunger pump hydraulic end comprises a stuffing box assembly, the stuffing box assembly is provided with a stuffing box shell 6, an overflow leading pipe 3 is arranged in the stuffing box shell 6, a drain hole 22 arranged at the bottom of a hydraulic end box body 19 is sequentially connected with a drain pipe 23, a sewage recovery pipe 29 of the plunger pump and a sewage circulation tank 3, wherein:

the stuffing box shell 6 is internally provided with labyrinth packing 32 and modified packing 14;

a cooling water supply main valve 27 in the stuffing box cooling and lubricating process is connected with a pump inlet pipeline 28, and an overflow lead pipe 3 arranged in a stuffing box shell 6 in each hydraulic end box body 19 in the plunger pump is respectively connected with a pressure measuring valve provided with a pressure gauge 25 in the stuffing box cooling and lubricating process;

an induction emitter 21 is further fixed at the bottom of the outer wall of the crankcase 16 in the hydraulic end box body 19, and the induction emitter 21 is wirelessly connected with a converter in an electric control cabinet of the water injection pump room.

The utility model discloses in, stuffing box assembly and crankcase 16 are all installed in fluid end box 19, the plunger 1 that is arranged in the stuffing box assembly is connected through the pole 17 that connects in plunger connector 18 and the crankcase 16, the stuffing box assembly in the plunger pump fluid end is fixed at the front end of pump head 20 through square pressure dish 8 and square pressure dish fixing bolt 7, the sewage that drips in the stuffing box cover 2 of follow stuffing box casing 6 front end is connected to the sewage recovery pipe 29 of plunger pump in through the wash port 22 and the drain pipe 23 of fluid end box 19 bottom and is introduced in the sewage circulation pond 30. The utility model discloses utilize the stuffing box cooling and lubrication flow effectively to prolong labyrinth packing 32 and the life and the work efficiency that reshape and pack 14 and plunger 1. The water introduced into the overflow lead pipe 3 in the stuffing box shell 6 can provide lubrication for the labyrinth packing 32, the modified packing 14 and the plunger 1 in the stuffing box shell 6, the cooling water supply main valve 27 in the stuffing box cooling and lubricating process is connected to the pump inlet pipeline 28, the overflow lead pipe 3 installed in the stuffing box shell 6 in each hydraulic end box 19 in the plunger pump is respectively connected with the pressure measuring valve provided with the pressure gauge 25 in the stuffing box cooling and lubricating process, and the observation and the timely maintenance of the working states of the modified packing 14 and the plunger 1 are facilitated.

The inductive transmitter 21 can wirelessly transmit the measured sewage information at the bottom of the hydraulic end tank body 19 to a converter in the electric control cabinet of the water injection pump room and transmit the sewage information to the central control room through the converter. If the drain hole 22 is blocked, when the depth of the sewage dripped from the stuffing box cover 2 at the front end of the stuffing box shell 6 to the bottom of the hydraulic end box body 19 reaches the induction transmitter 21, alarm information can be transmitted to a central control room, and the sewage can be cleaned in time. The lubricating oil can be prevented from being deteriorated due to the fact that water accumulated in the hydraulic end box body 19 enters the crankcase 16. When the accumulated water is not dredged in time, the water level of the accumulated water reaches the set position of the induction transmitter 21, and the control cabinet automatically stops the pump after receiving the signal.

The stuffing box cooling and lubricating process is provided with a cooling water supply main valve 27, a cooling water pipeline, an anti-filling check valve 24 and a pressure gauge 25; the number of the anti-filling check valves 24 and the pressure gauges 25 corresponds to the number of hydraulic ends of the plunger pump, and the overflow leading pipe 3 is correspondingly connected with the pressure gauge 25; the anti-backflow check valve 24 is installed in the cooling water line behind the cooling water supply main valve 27 and in front of the hydraulic end of the plunger pump. In the present embodiment, the cooling water supply main valve 27, the overflow leading pipe 3, the cooling water line, the anti-filling check valve 24 and the pressure gauge 25 constitute a stuffing box cooling and lubricating process. The cooling water enters the stuffing box assembly to cool and lubricate the labyrinth packing 32, the modified packing 14 and the plunger 1, and the water after cooling and lubrication drips from the periphery of the stuffing box cover 2 at the front end of the stuffing box shell 6 to the drain hole 22 and the drain pipe 23 at the bottom of the hydraulic end box body 19 to be connected into the sewage recovery pipe 29 of the plunger pump and is led into the sewage circulation tank 30.

The pressure gauge 25 is an electric contact pressure gauge, the pressure gauge 25 can be in wireless connection or wired connection with a converter in an electric control cabinet in the water injection pump room, and collected working condition signals of the filler can be sent to a central control room through the converter in the electric control cabinet of the water injection pump room. The packing includes labyrinth packing 32 and modified packing 14.

The valve seat of the anti-backflow check valve 24 connected in the cooling water line is positioned at one side of the cooling water supply main valve 27; the alarm pressure setting of the pressure gauge 25 is higher than the delivery pressure of the pump inlet line 28. The anti-backflow check valve 24 prevents high pressure fluid in the pump from flowing back into the pump inlet line 28, and if the set pressure of the cooling water main supply valve 27 is exceeded, the valve ball in the anti-backflow check valve 24 blocks the valve seat to prevent high pressure fluid in the pump from entering the pump inlet line 28. The stuffing box cooling and lubricating process consists of a cooling water supply main valve 27, a cooling water pipeline and a flow dividing process of each plunger pump hydraulic end, a check valve 24 and a pressure gauge 25 are arranged in the flow dividing process of each plunger pump hydraulic end, and the check valve 24 can prevent high-pressure liquid leaked by the plunger pump from flowing into a pump inlet pipeline 28 through the flow dividing process of the plunger pump hydraulic end. The inductive transmitter 21 can wirelessly transmit the measured sewage information at the bottom of the hydraulic end tank body 19 to a converter in the electric control cabinet of the water injection pump room and transmit the sewage information to the central control room through the converter. If the drain hole 22 is blocked, when the depth of the sewage which drips to the bottom of the hydraulic end box body 19 from the stuffing box gland 2 at the front end of the stuffing box shell 6 reaches the induction transmitter 21, alarm information can be transmitted to a central control room, and the sewage can be cleaned in time. The problem that the lubricating oil is deteriorated due to the fact that water accumulated in the hydraulic end box body 19 enters the crankcase 16 can be prevented. When the accumulated water is not dredged in time, the water level of the accumulated water reaches the set position of the induction transmitter 21, and the control cabinet automatically stops the pump after receiving the signal.

An overflow regulating valve 4 is also arranged in the pipe body of the overflow guiding pipe 3 and can regulate the water quantity of the introduced water.

The labyrinth packing 32 is arranged in the stuffing box shell 6 between the front face of the water seal ring 11 and the stuffing box cover 2, the modified packing 14 is arranged in the stuffing box shell 6 behind the water seal ring 11, and the front guide ring 10 and the rear guide ring 15 are respectively arranged at the two ends of the modified packing 14 between the water seal ring 11 and the bottom of the stuffing box shell 6.

The external thread at the lower part of the stuffing box gland 2 at the front end of the stuffing box shell 6 is connected with the internal thread at the front part of the stuffing box shell 6, and the hook wrench fastening hole 9 is also arranged on the outer wall of the stuffing box gland 2; and processing a toothed curve on the surface of the central hole of the gland 2 of the stuffing box to form labyrinth lines.

The embodiments described above are merely exemplary embodiments, but the present invention is not limited to these embodiments, and those skilled in the art can make modifications without departing from the spirit and teaching of the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and modifications can be made, and equivalents can be substituted for elements thereof. Any modification, equivalent replacement, improvement and the like made within the spirit and the concept of the present invention should be included in the protection scope of the present invention. The scope of protection is therefore not limited to the description above.

Claims (11)

1. The utility model provides a plunger pump hydraulic end, includes the stuffing box assembly, and the stuffing box assembly is equipped with stuffing box casing and conventional filler, and conventional filler is installed in the stuffing box casing, is equipped with the overflow induction pipe in the stuffing box casing, and the wash port that hydraulic end bottom half set up is connected characterized by with the sewage recovery pipe and the sewage circulation pond of drain pipe, plunger pump in proper order: the stuffing box shell is also internally provided with a modified stuffing; a cooling water supply pipe is arranged in the stuffing box shell; a cooling water supply main valve in the stuffing box cooling and lubricating process is connected with a pump inlet pipeline, and a cooling water supply pipe arranged in a stuffing box shell in each hydraulic end box body in the plunger pump is respectively connected with a pressure measuring valve provided with a pressure gauge in the stuffing box cooling and lubricating process;

and an induction transmitter is also fixed at the bottom of the outer wall of the crankcase in the hydraulic end box and is wirelessly connected with a converter in an electric control cabinet of the water injection pump room.

2. The hydraulic end of a plunger pump as claimed in claim 1, wherein the stuffing box cooling and lubricating process is provided with a cooling water supply main valve, a cooling water pipeline, an anti-filling check valve and a pressure gauge; the number of the anti-filling check valves and the pressure gauges corresponds to the number of the hydraulic ends of the plunger pump, and the cooling water supply pipe is correspondingly connected with the pressure gauges; the anti-filling check valve is installed in the cooling water line behind the cooling water supply main valve and in front of the hydraulic end of the plunger pump.

3. The hydraulic end of the plunger pump as claimed in claim 2, wherein the pressure gauge is an electric contact pressure gauge, the pressure gauge can be wirelessly connected or wired with a converter in an electrical control cabinet in the water injection pump room and can transmit the collected working condition signal of the filler to the central control room through the converter in the electrical control cabinet of the water injection pump room; the valve seat of the anti-filling check valve connected to the cooling water pipeline is positioned on one side of the cooling water supply main valve; the alarm pressure set value of the pressure gauge is higher than the delivery pressure of the inlet pipeline of the pump.

4. The hydraulic end of a plunger pump as claimed in claim 2, wherein the cooling water supply pipe and the overflow water lead pipe are respectively screw-connected to guide joints fixed to both sides of the stuffing box housing; the pipe body of the overflow leading pipe is also provided with an overflow regulating valve.

5. The hydraulic end of a plunger pump as claimed in claim 4, wherein a water seal ring is arranged in a stuffing box shell corresponding to the cooling water supply pipe and the overflow leading pipe, the water seal ring is a circular groove body, the outer wall of the circular groove body is provided with a liquid flow hole, and the water seal ring is sleeved outside the plunger through a central hole; and a water storage groove is formed in the inner wall of the stuffing box shell corresponding to the water seal ring, and a water collecting tank is formed by the water storage groove and the spaces on two sides of the water seal ring.

6. The hydraulic end of a plunger pump as claimed in claim 1, wherein the external thread of the lower part of the stuffing box cover at the front end of the stuffing box housing is connected with the internal thread at the front part of the stuffing box housing, and the outer wall of the stuffing box cover is further provided with a hook wrench fastening hole.

7. A plunger pump hydraulic end as claimed in claim 5 wherein the stuffing box housing in front of the water seal ring contains conventional stuffing, the stuffing box housing behind the water seal ring contains modified stuffing and the modified stuffing between the water seal ring and the bottom of the stuffing box housing has front and rear guide rings at each end.

8. The hydraulic end of a plunger pump as claimed in claim 7, wherein the modified filler is a disk-shaped body provided with a central hole and a V-shaped groove, the V-shaped groove enables the longitudinal section of the modified filler to be Y-shaped, and the modified filler can be stacked together; the front end of the front guide ring is a plane, and the structure of the rear end of the front guide ring is consistent with that of the front end of the reshaping filler; the rear end of the rear guide ring is a plane, the front end of the rear guide ring is provided with a conical table, and the structure of the front end of the rear guide ring conforms to the structure of the rear end of the modified filler; the front guide ring can be laminated with the reshaping packing and the rear guide ring in the stuffing box shell.

9. The utility model provides a plunger pump hydraulic end, includes the stuffing box assembly, and the stuffing box assembly is equipped with the stuffing box casing, is equipped with the overflow induction pipe in the stuffing box casing, and the wash port that hydraulic end bottom half set up is connected characterized by with the sewage recovery pipe and the sewage circulation pond of drain pipe, plunger pump in proper order: labyrinth packing and modified packing are arranged in the packing box shell;

a cooling water supply main valve in the stuffing box cooling and lubricating process is connected with a pump inlet pipeline, and an overflow lead pipe arranged in a stuffing box shell in each hydraulic end box body in the plunger pump is respectively connected with a pressure measuring valve provided with a pressure gauge in the stuffing box cooling and lubricating process;

and an induction transmitter is also fixed at the bottom of the outer wall of the crankcase in the hydraulic end box and is wirelessly connected with a converter in an electric control cabinet of the water injection pump room.

10. A plunger pump fluid end as claimed in claim 9 wherein the labyrinth packing is mounted in the stuffing box housing between the front face of the water seal ring and the stuffing box gland, the modified packing is mounted in the stuffing box housing behind the water seal ring and the modified packing between the water seal ring and the bottom of the stuffing box housing is mounted at each end with a front guide ring and a rear guide ring.

11. The hydraulic end of a plunger pump as claimed in claim 9, wherein the external thread of the lower part of the stuffing box cover at the front end of the stuffing box shell is connected with the internal thread at the front part of the stuffing box shell, and the outer wall of the stuffing box cover is further provided with a hook wrench fastening hole; and processing a toothed curve on the surface of the central hole of the gland of the stuffing box to form labyrinth lines.

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