CN111502978B - Connecting device for plunger and power end of diaphragm pump - Google Patents
Connecting device for plunger and power end of diaphragm pump Download PDFInfo
- Publication number
- CN111502978B CN111502978B CN202010295876.9A CN202010295876A CN111502978B CN 111502978 B CN111502978 B CN 111502978B CN 202010295876 A CN202010295876 A CN 202010295876A CN 111502978 B CN111502978 B CN 111502978B
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- Prior art keywords
- shaft section
- plunger
- hole
- sleeve
- connecting shaft
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- 238000007789 sealing Methods 0.000 claims abstract description 22
- 239000000956 alloy Substances 0.000 claims description 5
- 230000007704 transition Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 11
- 238000000034 method Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/14—Pistons, piston-rods or piston-rod connections
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
- F04B43/06—Pumps having fluid drive
- F04B43/067—Pumps having fluid drive the fluid being actuated directly by a piston
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/06—Venting
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/08—Cooling; Heating; Preventing freezing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/14—Pistons, piston-rods or piston-rod connections
- F04B53/143—Sealing provided on the piston
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/22—Arrangements for enabling ready assembly or disassembly
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
The invention provides a device for connecting a plunger and a power end of a diaphragm pump, which solves the problems that the weight of the plunger is large and the installation is inconvenient in the existing diaphragm pump; the plunger is easy to wear and deform and the service life of the sealing element is shortened; the plunger and the cross head are easy to fall off, so that the equipment is in fault. The device comprises a cross head, a top sleeve, a plunger, a clamping ring assembly, a thread clamping sleeve and a locking nut; one end of the cross head is provided with a blind hole with internal threads; the top sleeve is arranged at the bottom of the blind hole, and the outer end surface of the top sleeve is a concave spherical surface; the plunger comprises a working shaft section and a connecting shaft section; the connecting shaft section extends into the blind hole, the end surface is a convex spherical surface matched with the concave spherical surface, and the working shaft section is of a cavity structure; one end of the connecting shaft section extending into the blind hole is provided with a snap ring groove; the screw thread cutting sleeve is of a flange structure arranged between the connecting shaft section and the cross head blind hole, and the outer surface of the screw thread cutting sleeve is provided with external threads matched with the internal threads; the inner end surface of the thread cutting sleeve is of a step structure; the clamping ring assembly is clamped between the step structure and the clamping ring groove; the locking nut is used for locking the thread cutting ferrule.
Description
Technical Field
The invention relates to the technology of diaphragm pumps, in particular to a device for connecting a plunger of a diaphragm pump with a power end.
Background
In the diaphragm pump, the rotational motion of the speed reducer itself is converted into the circular motion of the crank pin (the constituent part of the crankshaft) by the crankshaft, and the circular motion of the crank pin is converted into the linear reciprocating motion of the crosshead by the connecting rod, so that the crosshead drives the plunger to reciprocate in a linear motion.
Plunger weight is great in the current diaphragm pump for the installation is inconvenient, and the plunger is in reciprocating rectilinear motion in-process, because the plunger dead weight makes the plunger appear abnormal abrasion deformation, causes the life of sealing member to shorten simultaneously, increases the equipment maintenance number of times, influences the whole operating efficiency of system. In addition, the small shaft diameter shaft end of the existing plunger is provided with an external thread, the external thread is in threaded hard connection with the internal thread of the cross head, and the plunger is connected with the cross head by adopting a half cutting sleeve, the cutting sleeve is fastened by using a screw, any part of the cross head or the plunger deviates from the shaft center due to the fact that the plunger is in threaded hard connection with the cross head, unit vibration, hydraulic oil pressure fluctuation and other reasons can cause the deviation of the cross head or the plunger from the shaft center, so that the motion track of the plunger deviates from the theoretical motion track, the plunger cannot be quickly and automatically restored to the centering state of the two shaft centers, and meanwhile, the cutting sleeve can be subjected to great tensile force to deform and damage, and the service life of the cutting sleeve is influenced; when the tensile force reaches a certain value, the screw is broken, so that the cross head and the plunger are easy to fall off, and further serious equipment faults are caused, and the diaphragm pump cannot normally operate.
Disclosure of Invention
In order to solve the problems that the plunger in the existing diaphragm pump is heavy and inconvenient to install; the plunger is easy to wear and deform, and the service life of the sealing element is shortened; in addition, the plunger is connected with the cross head through threads and a clamping sleeve, so that the technical problem that the cross head and the plunger are easy to fall off to cause equipment failure exists.
In order to achieve the above purpose, the technical scheme provided by the invention is as follows:
a connection device of a diaphragm pump plunger and a power end is characterized in that: the device comprises a cross head, a top sleeve, a plunger, a clamping ring assembly, a thread clamping sleeve and a locking nut; the clamping ring assembly comprises 2 buckled half clamping rings and sealing rings for hooping the 2 half clamping rings;
One end of the cross head is provided with a blind hole with internal threads along the axial direction;
the top sleeve is arranged at the bottom of the blind hole, and the outer end surface of the top sleeve is a concave spherical surface;
The plunger comprises a working shaft section and a connecting shaft section which are coaxially and fixedly connected, and the diameter of the working shaft section is larger than that of the connecting shaft section; the connecting shaft section extends into the blind hole, the end face of the connecting shaft section is a convex spherical surface matched with the concave spherical surface, and the working shaft section is of a cavity structure;
One end of the connecting shaft section extending into the blind hole is provided with a snap ring groove matched with the snap ring along the circumferential direction;
the thread cutting sleeve is of a flange structure arranged between the connecting shaft section and the cross head blind hole, and an external thread matched with the internal thread is arranged on the outer surface of the thread cutting sleeve;
The inner end face of the thread cutting sleeve is of a step structure;
the clamping ring assembly is clamped between the step structure and the clamping ring groove;
the locking nut is used for locking the thread cutting ferrule.
Further, at least 2 first radial assembly holes are formed in the thread cutting sleeve along the circumferential direction; at least 2 second radial assembly holes are formed in the lock nut along the circumferential direction.
Further, the blind hole is a step hole and comprises a first through hole and a second through hole, wherein the diameter of the first through hole is larger than that of the second through hole and is close to the plunger;
the top sleeve is positioned in the second through hole, and the outer end surface extends out of the second through hole;
the diameter of the top sleeve is larger than that of the connecting shaft section;
the internal thread is disposed on the first through hole.
Further, an annular groove for accommodating the sealing ring is formed in the outer surface of the half-clamping ring.
Further, the working shaft section is provided with a cavity which is opened on the end face, and a plunger seal head for sealing the cavity is arranged at the opening of the cavity to form the cavity structure;
and the outer circular surface of the working shaft section is sprayed with alloy materials.
Further, an installation threaded hole is formed in the middle of the outer end face of the top sleeve; the outer end face of the connecting shaft section is provided with a threaded center hole.
Further, the outer end face of the plunger seal head is provided with at least 2 threaded assembly holes and 1 central taper hole.
Further, an exhaust hole communicated with the cavity is formed at the joint of the working shaft section and the connecting shaft section;
The plunger seal head is in threaded connection with the working shaft section, and a sealing gasket is arranged at the joint.
Further, the internal threads on the blind hole of the cross head, the external threads of the thread cutting sleeve and the internal threads of the locking nut are fine threads.
Further, the working shaft section and the connecting shaft section are in smooth transition connection.
Compared with the prior art, the invention has the advantages that:
1. The plunger in the connecting device comprises the working shaft section and the connecting shaft section, wherein the outer circular surface of the working shaft section is a working surface, the working shaft section can be designed into a cavity structure, and meanwhile, the diameter of the connecting shaft section is designed to be smaller than that of the working shaft section, so that the weight of the plunger is reduced, the movement inertia impact is reduced, and the service lives of the sealing element and the wearing element are prolonged; the top sleeve is arranged in the cross head, the top sleeve is in spherical contact with the plunger, if the positions of the plunger and the cross head are slightly deviated, the plunger and the cross head can be quickly restored to the centering position through the spherical surface, and the plunger and the cross head can be positioned and centered conveniently; the connecting device is in threaded connection with the cross head through the outer surface of the threaded clamping sleeve, the inner surface of the connecting device is axially limited through the clamping ring on the plunger, and when the cross head moves to the side close to the plunger, the cross head pushes the plunger to move through the jacking sleeve; when the cross head moves to one side far away from the plunger, the cross head is connected with the threaded clamping sleeve into a whole, and the threaded clamping sleeve drives the plunger to move through the clamping ring due to the limiting effect of the clamping ring, so that the connection stability of the cross head and the plunger is good in the reciprocating work of the cross head.
2. According to the invention, radial assembly holes are formed in the thread cutting ferrule and the locking nut, so that the installation and the disassembly of the thread cutting ferrule and the locking nut by using the tool are facilitated.
3. In order to facilitate the installation of the sealing ring, the outer surface of the semi-clamping ring is provided with an annular groove.
4. According to the invention, the alloy material is sprayed on the outer circular surface of the working shaft section, so that the wear resistance of the plunger is enhanced.
5. According to the invention, the mounting threaded hole is machined on the top sleeve, and the tool is used for mounting in the mounting threaded hole, so that the top sleeve is convenient to mount and dismount in the blind hole of the cross head;
The function of processing the threaded centre bore of connecting axle section outer terminal surface firstly can use centre bore centering mill working axle section's excircle when processing, secondly can use hanging ring screw to install in central Kong Qidiao plunger in the assembly process, the installation of being convenient for.
6. The threaded assembly holes on the plunger seal head are convenient for using tools to mount and dismount the plunger seal head.
7. The plunger can be provided with the exhaust hole, and heat generated in the processing process of the outer circular surface of the working shaft section can be discharged through the processed exhaust hole, so that the normal processing process is ensured.
8. According to the invention, the cross head, the thread cutting sleeve and the locking nut are all fine threads, so that the reliability of connection is ensured.
Drawings
FIG. 1 is a schematic diagram of the structure of a diaphragm pump plunger and power end connection device of the present invention;
FIG. 2 is a schematic diagram of the assembly of the plunger and the threaded ferrule and the lock nut in the device for connecting the plunger and the power end of the diaphragm pump of the present invention;
FIG. 3 is an enlarged fragmentary schematic view of the portion I of FIG. 2;
FIG. 4 is a schematic view of the structure of the invention in which the top sleeve is mounted in the cross head in the connection device of the diaphragm pump plunger and the power end;
FIG. 5 is a schematic illustration of the structure of a plunger in the diaphragm pump plunger and power end connection of the present invention;
Wherein, the reference numerals are as follows:
The device comprises a 1-plunger, a 11-working shaft section, a 12-connecting shaft section, a 121-central hole, a 13-plunger seal head, a 131-threaded assembly hole, a 132-central conical hole, a 14-cavity, a 15-sealing gasket, a 16-clamping ring groove, a 17-convex spherical surface, an 18-exhaust hole, a 2-threaded clamping sleeve, a 21-step structure, a 22-first radial assembly hole, a 3-locking nut, a 31-second radial assembly hole, a 4-clamping ring assembly, a 41-semi-clamping ring 42-sealing ring, a 5-top sleeve, a 51-concave spherical surface, a 52-installation threaded hole, a 6-cross head, a 61-blind hole, a 611-first through hole, a 612-second through hole and a 7-lifting ring screw.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 to 3, a device for connecting a plunger and a power end of a diaphragm pump comprises a cross head 6, a top sleeve 5, a plunger 1, a clamping ring assembly 4, a threaded clamping sleeve 2 and a locking nut 3.
The cross head 6 is used for connecting with one end center of the plunger 1, and is provided with a blind hole 61 with internal threads along the axial direction.
As shown in fig. 4, the top sleeve 5 is disposed at the bottom of the blind hole 61, the inner end surface of the top sleeve is in contact with the bottom of the blind hole 61, the outer end surface (the end surface close to the plunger 1) is a concave spherical surface 51, a mounting threaded hole 52 is formed in the middle of the outer end surface of the top sleeve 5, and a fixture is mounted in the mounting threaded hole 52, so that the top sleeve 5 is conveniently mounted in the blind hole 61 of the cross head 6 through the fixture.
As shown in fig. 5, the plunger 1 comprises a working shaft section 11 and a connecting shaft section 12 which are coaxially and fixedly connected, wherein the diameter of the working shaft section 11 is larger than that of the connecting shaft section 12; the working shaft section 11 and the connecting shaft section 12 are in smooth transition connection, alloy materials are sprayed on the outer circular surface of the working shaft section 11, and the sprayed alloy materials enhance the wear resistance of the plunger 1; the working shaft section 11 is of a cavity structure, specifically the working shaft section 11 is provided with a cavity 14 which is opened on the end face, and a plunger seal head 13 for sealing the cavity is arranged at the opening of the cavity 14 to form the cavity structure; the plunger seal head 13 is in threaded connection with the working shaft section 11, and a sealing gasket 15 is arranged at the joint. The plunger 1 of the embodiment adopts a hollow structure, reduces self weight, reduces motion inertia impact, prolongs the service life of the sealing element and the wearing part, and correspondingly reduces the frequency of replacing the sealing element and the wearing part.
One end of the connecting shaft section 12 stretches into the blind hole 61, the end face is a convex spherical surface 17 matched with the concave spherical surface 51, the contact position of the plunger 1 and the cross head 6 is in spherical surface contact, the axis of the connecting shaft section 12 of the plunger 1 cannot be automatically restored to the concentric position when the axis of the plunger 1 and the cross head 6 deviate, the outer end face of the connecting shaft section 12 is the convex spherical surface 17, the end face is matched with the power end, the contact position of the plunger 1 and the power end is in spherical surface contact, and if the position of the plunger 1 and the cross head 6 slightly deviates, the plunger 1 can be quickly restored to the centering position through the spherical surface.
One end of the connecting shaft section 12 extending into the blind hole 61 is provided with a snap ring groove 16 matched with the snap ring along the circumferential direction.
The outer end surface of the connecting shaft section 12 is provided with a threaded center hole 121, so that the outer circle of the working shaft section 11 can be centered and ground by using the center hole 121 during processing, and the lifting plunger 1 can be lifted by using the lifting ring screw 7 to be mounted in the center hole 121 during assembling, thereby being convenient for processing and mounting.
At least 2 threaded assembly holes 131 and 1 central taper hole 132 are formed in the outer end face of the plunger seal head 13; the 2 threaded assembly holes 131 can be used for installing tools, and the plunger seal head 13 can be conveniently installed and detached at the opening of the cavity of the working shaft section 11 through the tools.
The screw thread cutting ferrule 2 is the flange structure of setting between connecting axle section 12 and cross head 6 blind hole 61, and screw thread cutting ferrule 2 surface is equipped with internal thread complex external screw thread, and the internal thread on the cross head 6 blind hole 61 and the external screw thread of screw thread cutting ferrule 2 are the fine thread, guarantee the reliability of connection. The inner end surface (the end surface close to the cross head 6) of the thread cutting sleeve 2 is a step structure 21.
The snap ring assembly 4 is clamped between the step structure 21 and the snap ring groove 16, the snap ring assembly 4 comprises 2 buckled half snap rings 41 and seal rings 42,2 used for hooping the 2 half snap rings 41, the half snap rings 41 are sleeved in the snap ring groove 16 of the plunger 1, the outer end face extends out of the snap ring groove 16 and is fastened through the seal rings 42, and the extending parts of the 2 half snap rings 41 are located in the step structure 21 of the threaded clamping sleeve 2. The positioning and the installation of the sealing ring 42 are convenient, and an annular groove for accommodating the sealing ring 42 is arranged on the outer surface of the half clamping ring 41.
A lock nut 3 is located between the screw ferrule 2 and the cross-head 6 for locking the screw ferrule 2.
The first radial assembly holes 22 of 8 equipartitions are offered along the circumferencial direction to screw thread cutting ferrule 2, and installation frock is convenient for install screw thread cutting ferrule 2 rotation between connecting axle section 12 and cross 6 blind hole 61 through frock in first radial assembly hole 22, and the second radial assembly hole 31 of 8 equipartitions is offered along the circumferencial direction to lock nut 3 in the same way, is convenient for install and dismantle.
The blind hole 61 on the cross head 6 is a step hole which is convenient for the installation of the top sleeve 5, the step hole comprises a first through hole 611 and a second through hole 612, and the diameter of the first through hole 611 is larger than that of the second through hole 612 and is arranged close to the plunger 1; the top sleeve 5 is positioned in the second through hole 612, and the outer end surface extends out of the second through hole 612; the diameter of the top sleeve 5 is larger than that of the connecting shaft section 12; accordingly, the internal thread is provided on the first through hole 611.
The joint of the working shaft section 11 and the connecting shaft section 12 is provided with an exhaust hole 18 communicated with the cavity, a large amount of heat can be generated when the outer circular surface of the working shaft section 11 of the plunger 1 is processed, and the heat generated in the processing process can be discharged through the exhaust hole 18, so that the normal processing process is ensured.
The threaded ferrule 2 comprises a sleeve between the plunger 1 and the cross-head 6 and an annular plate arranged at the end of the sleeve remote from the cross-head 6.
The processing method of the plunger 1 in the connecting device of the embodiment comprises the following steps:
1) Processing a plunger seal head 13, a working shaft section 11 and a connecting shaft section 12;
Wherein, a plurality of screw thread assembly holes 131 which are uniformly distributed along the circumference are processed on the plunger seal head 13;
2) Machining a cavity on the outer end face of the working shaft section 11;
3) An exhaust hole 18 is formed at the joint of the working shaft section 11 and the connecting shaft section 12;
4) Encapsulating the plunger seal head 13 at the opening of the cavity;
5) Processing a process hole in the center of the outer end face of the connecting shaft section 12 and the outer end face of the plunger seal head 13;
6) The outer cylindrical surface of the working shaft section 11 is finished by positioning with two process holes.
7) A threaded central bore 121 is machined in the outer end face of the connecting shaft section 12.
The assembly process of the connecting device of the embodiment comprises the following steps:
1) Installing a tool in the installation threaded hole 52 of the top sleeve 5, installing the top sleeve 5 in the blind hole 61 of the cross head 6 through the tool, and enabling the top sleeve 5 to be in clearance fit with the cross head 6;
2) The 2 half clamping rings 41 are clamped in the clamping ring grooves 16 of the connecting shaft section 12 and are tightly fastened through the sealing rings 42;
3) The threaded cutting ferrule 2 is sleeved on the connecting shaft section 12 of the plunger 1, and the outer end surfaces of the 2 half clamping rings 41 are clamped into the step structure 21 of the threaded cutting ferrule 2;
4) The connecting shaft section 12 assembled with the threaded cutting sleeve 2 is arranged in the blind hole 61 of the cross head 6, the plunger 1 is pushed to move by rotating the threaded cutting sleeve 2 until the convex spherical surface 17 of the end surface of the connecting shaft section 12 is in spherical contact with the concave spherical surface 51 of the outer end surface of the top sleeve 5,
5) The thread cutting ferrule 2 is locked through the locking nut 3;
when the cross head 6 and the plunger 1 need to be disassembled, the locking nut 3 is only required to be loosened, the threaded ferrule 2 is screwed out of the blind hole 61 of the cross head 6, and the plunger 1 is simultaneously moved outwards.
The working process of the connecting device of the embodiment is as follows:
When the cross head 6 moves to the side close to the plunger 1, namely, moves leftwards as shown in fig. 1, the cross head 6 pushes the plunger 1 to move leftwards through the top sleeve 5; when the cross head 6 moves to the side far away from the plunger 1, namely, moves rightwards as shown in fig. 1, the cross head 6 is connected with the threaded clamping sleeve 2 into a whole, and the threaded clamping sleeve 2 drives the plunger 1 to move rightwards through the clamping ring due to the limiting effect of the clamping ring.
The foregoing description of the preferred embodiments of the present invention is merely illustrative, and the technical solution of the present invention is not limited thereto, and any known modifications may be made by those skilled in the art based on the main technical concept of the present invention, which falls within the technical scope of the present invention.
Claims (10)
1. A diaphragm pump plunger and power end connecting device is characterized in that: the device comprises a cross head (6), a top sleeve (5), a plunger (1), a clamping ring assembly (4), a threaded clamping sleeve (2) and a locking nut (3); the clamping ring assembly (4) comprises 2 buckled half clamping rings (41) and sealing rings (42) used for hooping the 2 half clamping rings (41);
one end of the cross head (6) is provided with a blind hole (61) with internal threads along the axial direction;
the top sleeve (5) is arranged at the bottom of the blind hole (61), and the outer end surface of the top sleeve is a concave spherical surface (51);
the plunger (1) comprises a working shaft section (11) and a connecting shaft section (12) which are coaxially and fixedly connected, wherein the diameter of the working shaft section (11) is larger than that of the connecting shaft section (12); the connecting shaft section (12) stretches into the blind hole (61), the end face is a convex spherical surface (17) matched with the concave spherical surface (51), and the working shaft section (11) is of a cavity structure;
one end of the connecting shaft section (12) extending into the blind hole (61) is provided with a snap ring groove (16) matched with the snap ring along the circumferential direction;
The thread cutting sleeve (2) is of a flange structure arranged between the connecting shaft section (12) and the cross head blind hole (61), and an external thread matched with the internal thread is arranged on the outer surface of the thread cutting sleeve (2);
The inner end face of the thread cutting sleeve (2) is of a step structure (21);
The clamping ring assembly (4) is clamped between the step structure (21) and the clamping ring groove (16);
The locking nut (3) is used for locking the threaded clamping sleeve (2).
2. The diaphragm pump plunger and power end connection of claim 1, wherein: at least 2 first radial assembly holes (22) are formed in the threaded cutting ferrule (2) along the circumferential direction;
the lock nut (3) is provided with at least 2 second radial assembly holes (31) along the circumferential direction.
3. The diaphragm pump plunger and power end connection of claim 2, wherein: the blind hole (61) is a stepped hole and comprises a first through hole (611) and a second through hole (612), wherein the diameter of the first through hole (611) is larger than that of the second through hole (612) and is close to the plunger (1);
the top sleeve (5) is positioned in the second through hole (612), and the outer end surface extends out of the second through hole (612);
the diameter of the top sleeve (5) is larger than that of the connecting shaft section (12);
The internal thread is provided on the first through hole (611).
4. A diaphragm pump plunger and power end connection according to claim 1 or 2 or 3, wherein: the outer surface of the half clamping ring (41) is provided with an annular groove for accommodating the sealing ring (42).
5. The diaphragm pump plunger and power end connection of claim 4, wherein: the working shaft section (11) is provided with a cavity (14) which is opened on the end face, a plunger seal head (13) for sealing the cavity (14) is arranged at the opening of the cavity (14), and the cavity structure is formed;
and the outer circular surface of the working shaft section (11) is sprayed with alloy materials.
6. The diaphragm pump plunger and power end connection of claim 5, wherein: the middle part of the outer end surface of the top sleeve (5) is provided with a mounting threaded hole (52); the outer end surface of the connecting shaft section (12) is provided with a threaded center hole (121).
7. The diaphragm pump plunger and power end connection of claim 6, wherein: at least 2 threaded assembly holes (131) and 1 central taper hole (132) are formed in the outer end face of the plunger seal head (13).
8. The diaphragm pump plunger and power end connection of claim 7, wherein: the joint of the working shaft section (11) and the connecting shaft section (12) is provided with an exhaust hole (18) communicated with the cavity (14);
the plunger seal head (13) is in threaded connection with the working shaft section (11), and a sealing gasket (15) is arranged at the joint.
9. The diaphragm pump plunger and power end connection of claim 8, wherein: the internal thread on the blind hole (61) of the cross head (6), the external thread of the thread cutting sleeve (2) and the internal thread of the locking nut (3) are fine threads.
10. The diaphragm pump plunger and power end connection of claim 8, wherein: the working shaft section (11) and the connecting shaft section (12) are in smooth transition connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010295876.9A CN111502978B (en) | 2020-04-15 | 2020-04-15 | Connecting device for plunger and power end of diaphragm pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010295876.9A CN111502978B (en) | 2020-04-15 | 2020-04-15 | Connecting device for plunger and power end of diaphragm pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111502978A CN111502978A (en) | 2020-08-07 |
| CN111502978B true CN111502978B (en) | 2024-06-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010295876.9A Active CN111502978B (en) | 2020-04-15 | 2020-04-15 | Connecting device for plunger and power end of diaphragm pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111502978B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112192499B (en) * | 2020-11-02 | 2024-04-05 | 中船动力有限公司 | Mounting tool and mounting method for high-pressure oil pump plunger combined O-shaped sealing ring |
| CN117108476B (en) * | 2023-10-24 | 2024-01-23 | 自贡诺力斯百盛压缩机有限公司 | Variable-frequency gas compressor |
Citations (1)
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| CN212360154U (en) * | 2020-04-15 | 2021-01-15 | 陕西航天动力高科技股份有限公司 | A diaphragm pump plunger and power end connecting device |
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| DE20321307U1 (en) * | 2002-12-16 | 2007-01-04 | Flaig, Hartmut | Process to manufacture an automotive oil sump drain plug by insertion of an expansion tool into a small diameter metal blank |
| CN203257661U (en) * | 2013-05-07 | 2013-10-30 | 姜堰市化肥有限责任公司 | Reciprocating pump plunger fixing device |
| CN207701346U (en) * | 2017-11-09 | 2018-08-07 | 合肥华升泵阀股份有限公司 | A kind of spherical stopper head connection structure |
| CN208518874U (en) * | 2018-07-17 | 2019-02-19 | 陈南南 | A kind of plunger and plunger pump having plunger ring |
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| CN212360154U (en) * | 2020-04-15 | 2021-01-15 | 陕西航天动力高科技股份有限公司 | A diaphragm pump plunger and power end connecting device |
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