EP2356339B1 - Clamping device for cylinder bush and its use and flushing pump with a clamping device - Google Patents

Description

The invention relates to a clamping device for cylinder liners of a pump system and a piston or plunger pump for conveying rinsing fluid when drilling holes in particular in the field of oil and gas extraction. This pump system consists of a pump unit and a driving rotary drive device. Furthermore, the invention relates to the use of a clamping device in a piston or plunger pump.

The injection of the mud or drilling fluid through the pump system when drilling holes in the drill string or borehole pursues several goals. The drilling fluid is used for discharging the excavated cuttings or debris, the cooling and lubricating of the drilling tool located at the bottom of the hole or its drive. The pressure generated in the borehole must balance with the gases and liquids in the surrounding rock.

To generate the required volume flow, which is in the range of 3000 l / min and to generate the required pressure, which can be up to 500 bar, extremely powerful pump systems are required.

By default, pressure and flow are generated by the movement of one or more displacers (pistons) that create a periodically changing, outwardly sealed working space.

These reciprocating engines are characterized in that they the rotational movement of the rotary drive device via a crank mechanism in an axial movement that moves the piston, implemented. A variation is the execution of the piston as a plunger there.

The working space is formed by the cylinder liner and the piston moving in it.

The cylinder liner in its particular application in rinse pumps has features compared to e.g. to internal combustion engines or other piston pumps.

On the one hand, these cylinder liners are subject to increased wear due to the extremely aggressive and, in particular, solids-laden abrasive medium, the drilling fluid.

On the other hand, the pressure and volume flow of a rinsing pump can not be adjusted exclusively by the variation of the speed, but also by the variation of the piston used. This is done by inserting different pistons with matching cylinder liners into the pumps.

Thus, the following requirements apply to the cylinder liner and in particular to their attachment:

Due to wear and tear and conversion of the system to other pressures or volumes, the attachment must enable short set-up times and low labor input.

The cylinder liner must be pressed with a defined contact force against the receptacle to ensure the function of the local seal. Both components form the high pressure section of the System. Leaks in this area are both dangerous and costly.

Both the work environment and the existing tool must be considered extremely rough in the drilling industry. In addition, the existing drilling fluid is usually aggressive. Thus, another requirement is a fastener that is robust and corrosion resistant.

According to the known state of the art, cylinder liners are connected via three different systems to the pressurized part of the rinsing pump, called the water part.

The first system has a conical flank wing clamp in which the contact force is provided by a cone. The contact pressure is generated by screws that pull the clamp around the cylinder liner and the receptacle. The clamp lies with its straight edge on the cylinder liner and with the conical part on the corresponding counterpart on the receptacle.

The wing clamps have the great disadvantage that they are very bulky and the torque can be applied only very inaccurate over a torque wrench on the cylinder liner. In addition, this factor scatters strongly due to the conical surface, which can be worn and / or soiled (oily), which has a direct influence on the transmitted contact force. The assembly of the clamp is extremely power consuming and carries a certain risk of injury. A check of the contact pressure is not possible without renewed tightening.

The second system has a hydraulically pre-tensioned pin with spring clamp. In this system, the bearing bolts are elongated with a hydraulic pump or the hydraulic force acts against separate spring package and thus generates a deflection. The system is bolted torque-free. After releasing the pressure, the required contact pressure is purely mechanical in the system.

The hydraulic system offers the great advantage of an exact contact force of the cylinder liner, which is also referred to as a liner. The disadvantage, however, that cylinder liner and clamping element in two crane strokes and thus must be lifted separately into it. In addition, a hydraulic pump and hydraulic oil must be available. The hydraulic components and in particular the filler neck tend to be damaged or susceptible to interference and repair. Due to the more complex structure, the system is about twice as expensive as the wing clamp with liner holder. A subsequent control of the contact force is also not possible here, although there is the risk of loosening or loosening of the cylinder liner or the liner due to vibration through the drilling process or the flushing process.

The third system clamps the cylinder liner by an external thread. The clamp has an externally threaded member which is slipped over the cylinder liner and supported against it. Together, these elements are screwed into an inner thread attached to the water part, wherein the required contact force is applied by the pitch of the thread.

This system is both mechanically very simple and easy to use. Through the thread a very uniform contact force is applied to the seal. However, the only but very imprecise way of applying torque is to continue hammering the nut with a hammer for as long as the mechanic's power allows. The only control is the leak control during operation. The thread is also susceptible to corrosion and damage, which, with the concomitant wear to an even greater dispersion of Contact force leads. In addition, the force of the mechanic provides a barely calculable factor.

In the DE 3831909 A1 (D1) discloses a hydraulic cylinder with a cylinder tube and an end flange with guide bore for a piston rod. The end flange is inserted with a plug-in socket in the cylinder tube. The cylinder tube is surrounded by a clamping ring in the region of the plug-in socket. Further, orthogonal to the longitudinal axis of the guide bore mounting holes for receiving clamping screws are provided, which penetrate the clamping ring, the cylinder tube and the plug-in socket. As a result, a connection end flange / cylinder tube can be easily and quickly produced while saving on production costs in the modular system from prefabricated items. This pipe / flange connection is used as a pneumatic or hydraulic motor, in particular as a drive for swing arms in robotics. In a particular embodiment, the end flange and the plug-in socket is described as a one-piece component and together have the guide bore for the piston rod, wherein in the guide bore and on the plug-in sealing rings are mounted with which a perfect seal of the plug-in socket with the cylinder tube and the piston rod is reached in the piston rod guide. In the course of assembly, the clamping ring is secured by means of a centering pin on the cylinder tube for introducing the mounting holes against rotation, for which purpose the centering pin penetrates through the cylinder tube through into the plug-in socket. Furthermore, it can be seen from D1 that a closed end flange without guide bore for the piston rod is clamped with its plug-in socket in the other end of the cylinder tube in the same way as the end flange with guide bore for the piston rod and forms a cylinder cover or floor.

Disadvantage of D1 is the leadership of the piston rod in the cylinder, which leads to a statically indeterminate storage of the piston rod, whereby increased wear equal to several wearing parts occurs. Furthermore, this guide leads to a time-consuming piston change. A quick assembly and disassembly of the piston and the cylinder liner is prevented. Also, the print media supply is expensive and can not be used in a pump with integrated print media supply. Another disadvantage is the orthogonal to the longitudinal axis of the plug-in action of the described pipe / flange connection.

The US 4,981,401 (D2) discloses an adjustable tension screw with adjustable stress level. The document describes a screw which is inserted into an axial cavity and with which the voltage within the component can be measured. The screw also contains a display that - once the screw is in use - indicates that a pre-set value has been reached.

The adjustable bolt of the D 2 shows a complex mechanism that allows incorrect operation and is not suitable for applications for conveying rinsing fluid when drilling holes due to the prevailing harsh conditions.

The WO 2008/074428 A1 (D3) describes a fluid working machine for compressing fluids, preferably high pressure gases, with a linear motor, at least one cylinder, a solid-state piston axially movable in the cylinder, or an axially movable fluid piston and at least one between the cylinder and the solid-state piston or the liquid piston formed compression space is equipped. The linear motor transmits a translatory drive force to the solid-state piston or the liquid piston. In the described fluid working machine, a leakage and lubricant-free compression or delivery of fluids to high pressures with a simple structure is possible. The liquid piston or "liquid piston" assumes the function of a solid-state piston, wherein the liquid piston is driven translationally by the Wandermangnetfeld generated by means of coils of the linear motor.

A special attachment of the cylinder of the fluid working machine, which is suitable to ensure short set-up times and low labor costs, especially in a harsh environment, is not disclosed in this document.

The object of the invention is therefore to provide a fastening device which avoids the disadvantages of the prior art and at the same time is inexpensive and easy to use and a uniform and defined contact pressure of the sealing surface of the cylinder liner, and thus their function guaranteed. Furthermore, it is an object of the invention to provide a suitable piston or plunger pump and a method for mounting.

The object is solved by the features of claims 1 and 13 and 14. The subclaims specify further advantageous embodiments of the invention.

The inventive clamping device for a cylinder liner of a piston or plunger pump is characterized in that on the piston or plunger pump a cylinder sleeve receptacle and a clamping element are provided and the cylinder liner or a part of the cylinder liner between the clamping element and the cylinder liner receptacle is arranged and the clamping element and the Cylinder socket receptacle are interconnected by connecting means, wherein the connecting means or the clamping element having means for measuring or controlling at least one strain. With this device, it is advantageously possible to make the contact pressure of the sealing surface of the cylinder liner uniform and to measure during assembly and operation of the pump easily, reliably and quickly and without additional tools or measuring devices, the contact force or strain and thus to control.

A preferred clamping device is characterized in that the outer diameter of the cylinder liner or a part of the cylinder liner greater than the inner diameter of the cylinder liner receptacle and / or the clamping element is formed, whereby advantageously the use of existing or available liner or cylinder liners is possible. Furthermore, the handling is facilitated and the clamping device optimized in its design for use. As a rule, cylinder liners having an inner diameter of 3 to 10 inches, preferably 5 to 7.5 inches are used.

A further advantageous embodiment of the clamping device according to the invention provides that the clamping element is formed as part of the cylinder liner. As a result, the handling during assembly or disassembly can be improved due to fewer parts.

A particularly preferred embodiment of the clamping device according to the invention is characterized in that a guide element for the cylinder liner is preferably arranged in the form of a sleeve on the clamping element, whereby the cylinder liner during assembly and disassembly can be performed and handled better and easier and against tilting but also damage is better protected.

Another very advantageous clamping device according to the invention is characterized in that at least one device for the installation and removal preferably a lifting eye is arranged on the clamping element and / or the guide element and / or the cylinder liner. This is easier to handle, especially if the arrangement is tailored to the design of the device. The optimal vote of the arrangement of the installation and removal of the clamping element, the guide element and / or the cylinder liner is given when the lifting of the cylinder liner this is aligned approximately axially to the cylinder liner receptacle.

A preferred clamping device is designed such that the cylinder liner receptacle is formed as part of the piston or Plungerpumpengehäuses or the valve block of the piston or plunger pump, whereby the advantage of an improved and simpler design is connected.

A further advantageous clamping device provides that the connecting means each consist of a fastening element, preferably a stud, with an axially extending bore, in the form of a shaft, in which a measuring or control device is arranged, consisting of a projecting beyond the end face of the fastener Measuring pin, which is preferably anchored at its inner end to the shaft and at the protruding end a rotatable display element which is freely rotatable when the fastener is unloaded, but cooperates with the end face of the fastener under pressure and is secured against rotation when the fastener is subjected to a predetermined tensile load or strain. By this preferred embodiment, no tool or additional measuring devices is necessary to perform a measurement and control of the strain or the contact pressure of the cylinder liner during assembly or operation of the mud pump.

A particularly advantageously configured clamping device is characterized in that a further measuring or control device is arranged on a measuring or control device, consisting of a protruding over the end face of the first measuring pin second measuring pin, wherein the first shaft-shaped measuring pin has an axially extending bore and wherein the second measuring pin is anchored at its inner end preferably on the shank of the first measuring pin or the shaft of the fastener and at the protruding end a second rotatable display element which is freely rotatable when the fastener is unloaded, but with the end face of the first Measuring pin or the first display element cooperates under pressure and is secured against rotation when the first measuring pin is subjected to a second predetermined tensile load, which is greater than the first predetermined tensile load or strain voltage. With this preferred clamping device, not only a certain minimum force but also a maximum force can be measured, which allows above all the control of the overuse of the clamping device or the cylinder liner. This makes it possible to control the first measuring device in addition to the control of all fasteners to uniform strain and thus contact pressure of the cylinder liner.

A preferred variant of the clamping device according to the invention provides that cylinder liners are used with the same outer diameter and different inner diameters, which advantageously the same clamping device for cylinder liners with different sized pistons or plungers and thus can be used in different performance ranges of the flushing pumps.
In the respective cylinder liner, a piston or plunger is arranged, which is tuned to the inner diameter of the cylinder liner, cooperates with the cylinder liner and is connected to a drive.

In further advantageous embodiments of the clamping device according to the invention, a seal is arranged between the cylinder liner and the wear plate or between the cylinder liner to the valve block. Thus, the seal of the cylinder liner and the flushing system is improved and optimized.

Also advantageous is the embodiment of the inventive clamping device, are arranged on the outside of the cylinder liner and / or inside in the cylinder liner receptacle indentations. The recesses facilitate the guidance during assembly and disassembly of the cylinder liners, because the friction surfaces are reduced while maintaining optimum guidance is still guaranteed.

The piston or plunger pump according to the invention for use as a flushing pump has at least one of the above-described advantageous clamping devices for a cylinder liner. Thus, the disadvantages of the flushing pumps are avoided according to the prior art and optimizes the transport of flushing of the type mentioned by lower cost, especially in the easier assembly and disassembly of the cylinder liners.

The inventive method for mounting a cylinder liner of a piston or plunger pump is characterized by the advantageous use of one of the described clamping devices, whereby a simpler and safer assembly is achieved.

embodiment

• Figur 1 eine Klemmvorrichtung einer Zylinderbuchse als Teil einer Spülpumpe,
• Figur 2 eine Klemmvorrichtung einer Zylinderbuchse einer Spülpumpe in Schrägansicht und
• Figur 3 die Klemmvorrichtung zusammen mit einer Zylinderbuchse im Schnitt.

An embodiment of the invention is illustrated in the drawings and will be described in more detail below.
Show it

• FIG. 1 a clamping device of a cylinder liner as part of a rinsing pump,
• FIG. 2 a clamping device of a cylinder liner of a flushing pump in an oblique view and
• FIG. 3 the clamping device together with a cylinder liner in section.

FIG. 1 shows a clamping device for a cylinder liner 5 as part of a rinsing pump. The front part of a flushing pump is shown in section, wherein 100 represents a flushing pump with the clamping device 5 according to the invention. Depending on the design, a rinsing pump can have several cylinder liners with the corresponding pistons or plungers.

In the cut and only partially shown pump housing 13 projects from the left, the piston rod 36 in. It consists of a crosshead rod 30, on which a baffle plate 35 is attached, which protects the underlying part of the pump from flushing outlet in a seal failure. To the crosshead rod 30 , a connecting member 33 is attached via a wing clamp. Via a further wing clamp 34 , the actual piston rod 36 is connected to the connecting member 33 . At the front end of the actual piston 14 is attached via the piston nut 38 . Link 33, wing clamp 34 and piston nut 38 are used for quick assembly and disassembly of the piston 14 and cylinder liner. 5

The cylinder liner 5 seals via its sealing surface 20 to the valve block 25 . In the illustrated case, the sealing package is as follows: In front of the cylinder liner 5 and on its sealing surface 20 , a seal 19 is arranged. This presses on a wear plate 17, which serves to prevent Ausspüler and damage from the valve block 25 . The wear plate 17 also seals via a seal 18 to the actual valve block. The cylinder liner 5 is pressed against the seal assembly via the cylinder liner receptacle 2 and fasteners 3 , whereby the required pressure must be applied to the seal face 20 or seal 18 . The illustrated device is in the FIGS. 2 and 3 shown enlarged and described in more detail.

The piston 14 is placed in a translatory movement via the crosshead rod 30 and the crank drive connected thereto and the rotary drive device. By the back and forth movement of the piston 14 and the production of a pressure-tight space on the sealing surface 37 flushing is sucked in and expressed. The fluid is sucked in via the flushing flow 21 into the suction-side valve block 22 via the inner valve 23 . In the forward stroke of this valve 23 closes again and the fluid is under pressure through the pressure-side valve 24 in the central Pressed pressure line 26 , which connects all other cylinders not shown here among themselves. The fluid leaves at 27 the flushing pump.

The valve blocks 22 and 25 are interconnected and screwed together via the screw 28 to the front panel 1 of the Spülpumpegehäuses 13 . The entire housing 13 is mounted on a stable frame or carriage 32

FIG. 2 shows a clamping device for cylinder liners a flushing pump. On the front plate 1 of a pump housing 13, which is only partially shown, of a rinsing pump, the cylinder sleeve receiver 2 is fastened. The cylinder sleeve receptacle 2 receives the front part of the liner or the cylinder liner 5 and forms together with the water part of the flushing pump a pressure chamber, which is designed in this embodiment for up to 350 bar operating pressure. At its rear end, the cylinder liner 5 is guided by a clamping element 4 , to which a further sleeve-shaped cylinder liner guide element 8 is connected on the pump side. This cylinder liner guide element 8 is fixedly connected to the clamping element 4 . For easier and faster installation and removal of the cylinder liner 5 , a lifting eye 6 is arranged at the upper part of the cylinder liner guide element 8 , with which the clamping element 4 including the cylinder liner 5 therein lighter with the cylinder liner receptacle 2 and the valve block 25 or the front panel 1 of the pump housing can be connected. The lifting eye 6 can also be arranged on the clamping element 4 and advantageously serves as an assembly aid for the cylinder liner 5. Particularly advantageous is the arrangement of the lifting eye 6 on the clamping element 4 or the cylinder liner guide element 8 such that the cylinder liner 5 in horizontal position in the lifting position Position is more easily and without tilting or damage in the cylinder liner receptacle 2 to be introduced. It is also possible to arrange a plurality of lifting eyes as an assembly aid on the clamping element 4 and / or the cylinder liner guide element 8 .

In the cylinder liner 5 of the matching piston (not shown) is guided axially. Depending on requirements, the inner diameter of the cylinder liner 5 may have different diameters. The outer diameter of the cylinder liner 5 corresponds in this embodiment, with the exception of a clamping shoulder 7, the inner diameter of the clamping element 4 and the cylinder liner guide element 8. In its front, the valve block 25 side facing the cylinder liner 5 in a partial region, the clamping shoulder 7, an outer diameter, the is greater than the inner diameter of the clamping element 4 and the cylinder liner guide member 8 and the inner diameter of the cylinder liner receptacle 2. By means of the stud bolts as fastening elements 3 of the larger outer diameter comprising part of the cylinder sleeve 5 between the clamping member 4 and this preferably embodiment, the cylinder liner guide member 8 on the one Side and the cylinder liner shots 2 firmly clamped on the other side. In this advantageous embodiment, four studs are used. However, it is also possible to use three or more than four connecting elements 3 . The stud bolts are bolted to the cylinder liner receptacle 2 . The fastening elements 3 and studs have on their side facing the cylinder liner receptacle 2 on a head 11 of the fastener 3 , on whose end face 10 a measuring device 9 protrudes. The measuring device 9 is a device for measuring or checking at least one expansion stress. In particular, the strain measurement of the control of the contact pressure of the sealing surface of the cylinder liner 5 is used on the pressure-carrying element of the flushing pump as in this example, the wear plate 17 or the valve block 25. Such fasteners 3 with a torque or voltage measuring device 9 on the head are usually as Called Rotabolt.

The part of the cylinder liner 5, which has a larger outer diameter than the rest of the cylinder liner 5 is referred to in this case as a clamping shoulder 7 of the cylinder liner 5 . The clamping shoulder 7 is designed such that it is clamped tight and tight between cylinder sleeve receptacle 2 and clamping element 4 .

FIG. 3 represents the clamping device in cooperation with the cylinder liner in the section there. This is clearly visible as the cylinder liner 5 is pressed over the clamping shoulder 7 via the clamping element 4 against the valve block 25 . The cylinder liner 5 and / or the cylinder liner receptacle 2 can, as shown in this example, indentations on the mating surface 15 , which advantageously reduce the friction surface and allow easier guidance during installation and removal of the cylinder liner 5 .

In order to create a pressure-tight space between the two elements valve block 25 and cylinder liner 5 , the following arrangement of sealing elements is located in this example. The cylinder liner 5 presses with the sealing surface 20 against the wear plate 17. The seal 19 is compressed.

The cylinder liner 5 is guided on one side in the sleeve 8 of the clamping element 4 and guided on the other side in the cylinder liner receptacle 2 . This is connected via the screw 12 fixed to the valve block 25 and can be removed during disassembly on the Abdrückbohrungen 16 .

Furthermore, the valve block 25 is connected via the screw 28 to the front plate 1 of the flushing pump.

LIST OF REFERENCE NUMBERS

1. Front panel of the pump housing Second Cylinder liner recording Third Fastener with measuring device 4th clamping element 5th cylinder liner 6th lifting eye 7th Clamping shoulder of cylinder liner 5 8th. Guide element (sleeve shape) 9th Measuring device of the fastening element 3 10th End face on the head 11 of the fastener. 3 11th Head of the fastening element 3 12th Screw connection of cylinder bush receptacle 2 to valve block 25 13th wash pump 14th piston 15th Fitting surface between cylinder liner 5 and receptacle 2 16th Bore holes for cylinder liner receptacle 2 17th Wear plate between cylinder liner 5 and valve block 25 18th Seal member between wear plate 17 and valve block 25th 19th Sealing element between cylinder liner 5 and wear plate 17 20th Sealing surface of the cylinder liner 5 21st flushing inflow 22nd Valve block (suction side) 23rd Valve (suction side) 24th Valve (pressure side) 25th Valve block (pressure side) 26th Central pressure line between the valve blocks 27th pressure outlet 28th Screw connection from front panel 1 to valve block 25 29th Opening to the cylinder box chamber 30th Phillips rod 31st Tooling shoulders for disassembly 32nd Mounting frame for flushing pump 33rd Link between crosshead 30 and piston rod 36th 34th Wing clamp for connecting the connecting member 33 and the piston rod 36th 35th Baffle plate for flushing outlet 36th piston rod 37th Sealing surface of the piston 14 to the cylinder liner. 5 38th piston nut 39th valve cover 100th irrigation pump

Claims (14)

1. A clamping device comprising a clamping element (4), connecting means (3), a cylinder liner mounting (2) and a cylinder liner (5) of a reciprocating or plunger pump, characterized in that the cylinder liner (5) or a part of the cylinder liner (5) is arranged between the clamping element (4) and the cylinder liner mounting (2), and the clamping element (4) and the cylinder liner mounting (2) are connected to one another by connecting means (3), wherein the connecting means (3) are arranged axially with respect to the longitudinal axis of the cylinder liner (5), and the connecting means (3) or the clamping element (4) has devices (9) for measuring or checking at least one tensile stress.
2. The clamping device as claimed in claim 1, characterized in that the outside diameter of the cylinder liner (5) or a part of the cylinder liner (5) is designed to be greater than the inside diameter of the cylinder liner mounting (2) and/or of the clamping element (4).
3. The clamping device as claimed in claim 1 or 2, characterized in that the clamping element (4) is designed as part of the cylinder liner (5).
4. The clamping device as claimed in one of claims 1 to 3, characterized in that a guide element (8) for the cylinder liner (5) is arranged on the clamping element (4).
5. The clamping device as claimed in one of claims 1 to 4, characterized in that at least one device for fitting and removal, preferably a lifting eye (6), is arranged on the clamping element (4) and/or the guide element (8) and/or the cylinder liner (5).
6. The clamping device as claimed in one of claims 1 to 5, characterized in that the cylinder liner mounting is designed as part of the reciprocating or plunger pump housing (13) or of the valve block (25) of the reciprocating or plunger pump.
7. The clamping device as claimed in one of claims 1 to 6, characterized in that the connecting means (3) in each case consist of a fixing element in the form of a shaft, preferably a stud, with an axially extending hole, in which is arranged a measuring or checking device (9) consisting of a measuring pin which projects beyond the face (10) of the fixing element and which, at its inner end, is preferably anchored to the shaft and, at the protruding end, has a rotatable indicating element which can rotate freely when the fixing element is not loaded but acts together with the face surface of the fixing element under pressure and has a rotational locking device, wherein this can be adjusted to a predefined tensile load or tensile stress of the fixing element.
8. The clamping device as claimed in one of claims 1 to 7, characterized in that a further measuring or checking device consisting of a second measuring pin which projects beyond the face of the first measuring pin is arranged on a measuring or checking device (9), wherein the first measuring pin, which is in the form of a shaft, has an axially extending hole and wherein, at its inner end, the second measuring pin is anchored to the shaft of the first measuring pin or to the shaft of the fixing element and, at the protruding end, has a second rotatable indicating element which can rotate freely when the fixing element is not loaded but acts together with the face surface of the first measuring pin or the first indicating element under pressure and has a rotational locking device, wherein this can be adjusted to a second predefined tensile load of the first measuring pin which is greater than the first predefined tensile load or tensile stress.
9. The clamping device as claimed in one of claims 1 to 8, characterized in that cylinder liners (5) with the same outside diameter and different inside diameters can be used.
10. The clamping device as claimed in one of claims 1 to 9, characterized in that a piston (14) or plunger, the outside diameter of which is matched to the inside diameter of the cylinder liner (5) and is connected to a drive, is arranged in the cylinder liner (5).
11. The clamping device as claimed in one of claims 1 to 10, characterized in that a seal (19) is arranged between the cylinder liner (5) and the wear plate (17) or the valve block (25).
12. The clamping device as claimed in one of claims 1 to 11, characterized in that recesses are arranged on the outside of the cylinder liner (5) and/or on the inside of the cylinder liner mounting (2).
13. A reciprocating or plunger pump for use as a mud pump having at least one clamping device for a cylinder liner (5) as claimed in one of claims 1 to 12.
14. A method for fitting a cylinder liner of a reciprocating or plunger pump, characterized in that a clamping device as claimed in one of claims 1 to 12 is used.

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