CN111502978A - 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
- CN111502978A CN111502978A CN202010295876.9A CN202010295876A CN111502978A CN 111502978 A CN111502978 A CN 111502978A CN 202010295876 A CN202010295876 A CN 202010295876A CN 111502978 A CN111502978 A CN 111502978A
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- shaft section
- plunger
- hole
- connecting shaft
- sleeve
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- 238000007789 sealing Methods 0.000 claims abstract description 24
- 239000000956 alloy Substances 0.000 claims description 4
- 230000007704 transition Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 description 7
- 238000009434 installation Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000003754 machining Methods 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process 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
Images
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
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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
- 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
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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
- F04B53/08—Cooling; Heating; Preventing freezing
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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
- F04B53/143—Sealing provided on the 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
- F04B53/22—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 connecting device for a plunger piston and a power end of a diaphragm pump, which solves the problems that the plunger piston in the existing diaphragm pump is heavy and is inconvenient to install; the plunger is easy to wear and deform, and meanwhile, the service life of the sealing element is shortened; the plunger and the crosshead are easy to fall off to cause equipment failure. The device comprises a crosshead, a top sleeve, a plunger, a snap ring assembly, a threaded clamping sleeve and a locking nut; one end of the crosshead 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 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; a clamping ring groove is formed at one end of the connecting shaft section, which extends into the blind hole; the threaded cutting sleeve is of a flange structure arranged between the connecting shaft section and the blind hole of the crosshead, and the outer surface of the threaded cutting sleeve is provided with an external thread matched with the internal thread; the inner end surface of the threaded cutting sleeve is of a step structure; the clamping ring component is clamped between the step structure and the clamping ring groove; the locking nut is used for locking the threaded clamping sleeve.
Description
Technical Field
The invention relates to the technology of diaphragm pumps, in particular to a connecting device of a diaphragm pump plunger and a power end.
Background
In the diaphragm pump, the self rotary motion of the speed reducer is converted into the circular motion of a crank pin (the component part of the crankshaft) through the crankshaft, the circular motion of the crank pin is converted into the linear reciprocating motion of the crosshead through the connecting rod, and then the crosshead drives the plunger to reciprocate linearly.
The plunger weight is great in current diaphragm pump for the installation is not convenient, and the plunger is at reciprocating linear motion in-process, because the plunger dead weight for the plunger appears abnormal wearing and tearing and warp, causes the life of sealing member to shorten simultaneously, increases the overhaul of the equipments 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 an internal thread of a crosshead, a halved clamping sleeve is adopted for connection of the plunger and the crosshead, and a screw is used for fastening the clamping sleeve; when the pulling force reaches certain numerical value, can break the screw, cause cross head and plunger to drop easily, and then cause the major trouble of equipment, the unable normal operating of diaphragm pump.
Disclosure of Invention
The diaphragm pump aims to solve the problems that the existing diaphragm pump is large in plunger weight and inconvenient to install; the plunger is easy to wear and deform, and meanwhile, the service life of the sealing element is shortened; in addition, the plunger is connected with the crosshead through threads and a clamping sleeve, so that the technical problem that the crosshead is easy to fall off from the plunger to cause equipment failure exists.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
a connecting device for a diaphragm pump plunger and a power end is characterized in that: comprises a crosshead, a top sleeve, a plunger, a snap ring component, a threaded clamping sleeve and a locking nut; the clamping ring assembly comprises 2 buckled half clamping rings and a sealing ring for hooping the 2 half clamping rings;
one end of the crosshead is provided with a blind hole with an internal thread 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 surface 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, which extends into the blind hole, is provided with a clamping ring groove matched with the clamping ring along the circumferential direction;
the threaded clamping sleeve is of a flange structure arranged between the connecting shaft section and the crosshead blind hole, and external threads matched with the internal threads are arranged on the outer surface of the threaded clamping sleeve;
the inner end surface of the threaded 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 threaded clamping sleeve.
Furthermore, the threaded cutting sleeve is provided with at least 2 first radial assembling holes along the circumferential direction; and the locking nut is provided with at least 2 second radial assembling holes along the circumferential direction.
Furthermore, the blind hole is a stepped hole and comprises a first through hole and a second through hole, and 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 face of the top sleeve 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.
Furthermore, an annular groove for accommodating the sealing ring is formed in the outer surface of the half clamping ring.
Furthermore, the working shaft section is provided with a cavity with an opening at the end surface, and a plunger end socket for sealing the cavity is arranged at the opening of the cavity to form the cavity structure;
and alloy materials are sprayed on the outer circular surface of the working shaft section.
Furthermore, a mounting threaded hole is formed in the middle of the outer end face of the top sleeve; and a threaded central hole is formed in the outer end face of the connecting shaft section.
Furthermore, the outer end face of the plunger end socket is provided with at least 2 thread assembling holes and 1 central taper hole.
Furthermore, an exhaust hole communicated with the cavity is formed in the joint of the working shaft section and the connecting shaft section;
the plunger seal head and the working shaft section are in threaded connection, and a sealing gasket is arranged at the joint.
Furthermore, the internal thread on the blind hole of the crosshead, the external thread of the thread cutting sleeve and the internal thread of the locking nut are all fine threads.
Furthermore, 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 a working shaft section and a 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 the diameter of the connecting shaft section is designed to be smaller than that of the working shaft section, so that the self weight of the plunger is reduced, the motion inertia impact is reduced, and the service lives of a sealing element and a wear element are prolonged; the ejector sleeve is arranged in the crosshead and is in spherical contact with the plunger, and if the position of the plunger and the crosshead slightly deviates, the plunger can be quickly restored to a centering position through the spherical surface, so that the plunger and the crosshead can be conveniently positioned and centered; the connecting device is in threaded connection with the crosshead 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 crosshead moves to one side close to the plunger, the crosshead pushes the plunger to move through the top sleeve; when the cross head moves to one side of keeping away from the plunger, the cross head is connected as an organic whole with the screw thread cutting ferrule, because the limiting displacement of snap ring, the screw thread cutting ferrule passes through the snap ring and drives the plunger motion, consequently, in the reciprocating work of cross head, the connection steadiness of cross head and plunger is good.
2. The radial assembling holes are formed in the thread cutting sleeve and the locking nut, so that the thread cutting sleeve and the locking nut can be conveniently installed and detached by using a tool.
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 processed on the top sleeve, and the top sleeve is mounted in the mounting threaded hole by using a tool, so that the top sleeve is conveniently mounted and dismounted in the crosshead blind hole;
the threaded center hole is machined in the outer end face of the connecting shaft section, firstly, the center hole can be used for centering the outer circle of the grinding working shaft section during machining, and secondly, a lifting bolt can be mounted in the center hole to lift the plunger piston during assembly, so that the mounting is facilitated.
6. The threaded assembling hole on the plunger end socket is convenient for mounting and dismounting the plunger end socket by using a tool.
7. The plunger can be provided with the exhaust hole, and the heat generated in the machining process of the excircle surface of the working shaft section can be discharged through the processed exhaust hole, so that the normal operation of the machining process is ensured.
8. The crosshead, the threaded clamping sleeve and the locking nut of the invention all adopt fine threads, thereby ensuring the reliability of connection.
Drawings
FIG. 1 is a schematic structural view of a diaphragm pump plunger and power end connection device of the present invention;
FIG. 2 is a schematic view of the assembly of the plunger with the threaded ferrule and the locking nut in the device for connecting the plunger with the power end of the diaphragm pump according to the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2 at I;
FIG. 4 is a schematic view of the structure of the coupling device of the plunger and the power end of the diaphragm pump of the present invention in which the top sleeve is installed in the crosshead;
FIG. 5 is a schematic view of the configuration of the plunger in the diaphragm pump plunger and power end coupling arrangement of the present invention;
wherein the reference numbers are as follows:
1-plunger, 11-working shaft section, 12-connecting shaft section, 121-center hole, 13-plunger seal head, 131-threaded assembly hole, 132-center taper hole, 14-cavity, 15-sealing gasket, 16-clamping ring groove, 17-convex spherical surface, 18-exhaust hole, 2-threaded clamping sleeve, 21-step structure, 22-first radial assembly hole, 3-locking nut, 31-second radial assembly hole, 4-clamping ring component, 41-semi-clamping ring 42-sealing ring, 5-top sleeve, 51-concave spherical surface, 52-installation threaded hole, 6-crosshead, 61-blind hole, 611-first through hole, 612-second through hole and 7-lifting ring screw.
Detailed Description
The invention is described in further detail below with reference to the figures and specific embodiments.
As shown in fig. 1 to 3, the connecting device for the plunger and the power end of the diaphragm pump comprises a crosshead 6, a top sleeve 5, a plunger 1, a snap ring assembly 4, a threaded ferrule 2 and a locking nut 3.
The crosshead 6 is provided with a blind hole 61 with internal threads along the axial direction at the center of one end for connecting the plunger 1.
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 threaded mounting hole 52 is formed in the middle of the outer end surface of the top sleeve 5, and a tool is installed in the threaded mounting hole 52, so that the top sleeve 5 can be conveniently installed in the blind hole 61 of the crosshead 6 through the tool.
As shown in fig. 5, the plunger 1 includes a working shaft section 11 and a connecting shaft section 12 which are coaxially and fixedly connected, and 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, and alloy materials are sprayed on the outer circular surface of the working shaft section 11 to 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 with an opening at the end surface, and the opening of the cavity 14 is provided with a plunger seal head 13 for sealing the cavity to form the cavity structure; the plunger end enclosure 13 and the working shaft section 11 are in threaded connection, and a sealing gasket 15 is arranged at the joint. The plunger 1 of the embodiment adopts a hollow structure, so that the self weight is reduced, the motion inertia impact is reduced, the service lives of the sealing element and the abrasion part are prolonged, and the times for replacing the sealing element and the abrasion part are correspondingly reduced.
One end of the connecting shaft section 12 extends 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 crosshead 6 is in spherical contact, the shaft center can not be automatically and quickly restored to the concentric position when the shaft center of the connecting shaft section 12 of the plunger 1 and the crosshead 6 deviates, the outer end face of the connecting shaft section 12 is the convex spherical surface 17, the end face is used for being matched with a power end, the contact position of the plunger 1 and the power end can be in spherical contact, if the position of the plunger 1 and the crosshead 6 deviates slightly, the centering position can be quickly restored 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 face of the connecting shaft section 12 is provided with a threaded center hole 121, the center hole 121 can be used for centering and grinding the outer circle of the working shaft section 11 during machining, and a lifting ring screw 7 can be mounted in the center hole 121 to lift the plunger 1 during assembly, so that machining and mounting are facilitated.
The outer end face of the plunger end enclosure 13 is provided with at least 2 thread assembling holes 131 and 1 central taper hole 132; 2 the mountable frock of screw thread pilot hole 131, be convenient for through the frock install plunger head 13 with dismantle in the cavity opening part of working shaft section 11.
The threaded cutting ferrule 2 is the flange structure of setting between connecting shaft section 12 and 6 blind holes 61 of cross head, and 2 surfaces of threaded cutting ferrule are equipped with interior screw-thread fit's external screw thread, and the internal thread on 6 blind holes 61 of cross head and the external screw thread of threaded cutting ferrule 2 are fine thread, guarantee the reliability of connecting. The inner end surface (the end surface close to the crosshead 6) of the thread cutting sleeve 2 is of a step structure 21.
A locking nut 3 is located between the threaded cutting ferrule 2 and the crosshead 6 for locking the threaded cutting ferrule 2.
The first radial pilot hole 22 of 8 equipartitions is seted up along the circumferencial direction to screw thread cutting ferrule 2, installs the frock in first radial pilot hole 22, is convenient for rotate screw thread cutting ferrule 2 through the frock and installs between connecting shaft section 12 and 6 blind holes 61 of cross head, and on the same principle, the radial pilot hole 31 of second of 8 equipartitions is seted up along the circumferencial direction to lock nut 3, is convenient for install and dismantle.
The blind hole 61 on the crosshead 6 is a stepped hole to facilitate the installation of the top sleeve 5, the stepped hole comprises a first through hole 611 and a second through hole 612, 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 of the top sleeve 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, an 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, the heat generated in the processing process can be exhausted through the exhaust hole 18, and the normal operation of the processing process is ensured.
The threaded collar 2 comprises a sleeve located between the plunger 1 and the crosshead 6 and an annular plate located at the end of the sleeve remote from the crosshead 6.
The processing method of the plunger 1 in the connecting device of the embodiment comprises the following steps:
1) processing a plunger end socket 13, a working shaft section 11 and a connecting shaft section 12;
wherein, a plurality of thread assembling holes 131 which are uniformly distributed along the circumference are processed on the plunger end enclosure 13;
2) processing a cavity on the outer end face of the working shaft section 11;
3) an exhaust hole 18 is processed at the joint of the working shaft section 11 and the connecting shaft section 12;
4) the plunger end enclosure 13 is sealed at the opening of the cavity;
5) processing process holes in the centers of the outer end face of the connecting shaft section 12 and the outer end face of the plunger seal head 13;
6) and positioning by two process holes, and finishing the outer cylindrical surface of the working shaft section 11.
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 crosshead 6 through the tool, and enabling the top sleeve 5 to be in clearance fit with the crosshead 6;
2) clamping 2 half clamping rings 41 in a clamping ring groove 16 of the connecting shaft section 12, and sealing and fastening through a sealing ring 42;
3) sleeving the threaded clamping sleeve 2 on the connecting shaft section 12 of the plunger 1, and clamping the outer end faces of the 2 semi-snap rings 41 into the step structure 21 of the threaded clamping sleeve 2;
4) the connecting shaft section 12 provided with the threaded cutting sleeve 2 is arranged in the blind hole 61 of the crosshead 6, the plunger 1 is pushed to move by rotating the threaded cutting sleeve 2 until the convex spherical surface 17 on the end surface of the connecting shaft section 12 is in spherical contact with the concave spherical surface 51 on the outer end surface of the top sleeve 5,
5) the threaded cutting sleeve 2 is locked through a locking nut 3;
when the crosshead 6 and the plunger 1 need to be disassembled, only the lock nut 3 needs to be loosened, the threaded cutting ferrule 2 is screwed out from the blind hole 61 of the crosshead 6, and the plunger 1 is moved outwards at the same time.
The working process of the connecting device of the embodiment is as follows:
when the crosshead 6 moves to the side close to the plunger 1, i.e., to the left as shown in fig. 1, the crosshead 6 pushes the plunger 1 to move to the left by the knock sleeve 5; when the crosshead 6 moves towards one side far away from the plunger 1, namely moves rightwards as shown in figure 1, the crosshead 6 is connected with the thread cutting ferrule 2 into a whole, and the thread cutting ferrule 2 drives the plunger 1 to move rightwards through the clamping ring due to the limiting effect of the clamping ring.
The above description is only for the purpose of describing the preferred embodiments of the present invention and does not limit the technical solutions of the present invention, and any known modifications made by those skilled in the art based on the main technical concepts of the present invention fall within the technical scope of the present invention.
Claims (10)
1. The utility model provides a diaphragm pump plunger and power end connecting device which characterized in that: comprises a crosshead (6), a top sleeve (5), a plunger (1), a snap ring component (4), a threaded cutting sleeve (2) and a locking nut (3); the clamping ring assembly (4) comprises 2 buckled half clamping rings (41) and a sealing ring (42) for hooping the 2 half clamping rings (41);
one end of the crosshead (6) is provided with a blind hole (61) with an internal thread 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, and the diameter of the working shaft section (11) is larger than that of the connecting shaft section (12); the connecting shaft section (12) extends into the blind hole (61), the end surface of the connecting shaft section 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 clamping ring groove (16) matched with the clamping ring along the circumferential direction;
the threaded cutting sleeve (2) is of a flange structure arranged between the connecting shaft section (12) and the crosshead blind hole (61), and external threads matched with the internal threads are arranged on the outer surface of the threaded cutting sleeve (2);
the inner end surface of the threaded cutting sleeve (2) is of a step structure (21);
the clamping ring component (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: the threaded cutting sleeve (2) is provided with at least 2 first radial assembling holes (22) along the circumferential direction;
and the locking nut (3) is provided with at least 2 second radial assembling 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), and 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 face of the top sleeve 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 as claimed in claim 1, 2 or 3, wherein: and an annular groove for accommodating a sealing ring (42) is formed in the outer surface of the semi-clamping ring (41).
5. The diaphragm pump plunger and power end connection of claim 4, wherein: the working shaft section (11) is provided with a cavity (14) with an opening at the end surface, and a plunger end socket (13) for sealing the cavity (14) is arranged at the opening of the cavity (14) to form a cavity structure;
and alloy materials are sprayed on the outer circular surface of the working shaft section (11).
6. The diaphragm pump plunger and power end connection of claim 5, wherein: a mounting threaded hole (52) is formed in the middle of the outer end face of the top sleeve (5); the outer end face 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: the outer end face of the plunger end socket (13) is provided with at least 2 thread assembling holes (131) and 1 central taper hole (132).
8. The diaphragm pump plunger and power end connection of claim 7, wherein: an exhaust hole (18) communicated with the cavity (14) is formed at the joint of the working shaft section (11) and the connecting shaft section (12);
plunger head (13) and working shaft section (11) adopt threaded connection, and the junction is equipped with sealed pad (15).
9. The diaphragm pump plunger and power end connection of claim 8, wherein: the internal thread on the blind hole (61) of the crosshead (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 true CN111502978A (en) | 2020-08-07 |
| CN111502978B 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) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112192499A (en) * | 2020-11-02 | 2021-01-08 | 中船动力有限公司 | Installation tool and installation method for high-pressure oil pump plunger combined type O-shaped sealing ring |
| CN117108476A (en) * | 2023-10-24 | 2023-11-24 | 自贡诺力斯百盛压缩机有限公司 | Variable-frequency gas compressor |
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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 |
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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 | Connecting device for plunger and power end of diaphragm pump |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112192499A (en) * | 2020-11-02 | 2021-01-08 | 中船动力有限公司 | Installation tool and installation method for high-pressure oil pump plunger combined type O-shaped sealing ring |
| 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 |
| CN117108476A (en) * | 2023-10-24 | 2023-11-24 | 自贡诺力斯百盛压缩机有限公司 | Variable-frequency gas compressor |
| 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 |
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| CN111502978B (en) | 2024-06-18 |
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