Mud pump crosshead upper and lower guide plate centering detection tool

Abstract

The utility model relates to a mud pump crosshead upper and lower guide plate centering detection tool comprising a piston rod, the front end of the piston rod is provided with a piston installation segment, and the piston installation segment comprises a polished rod segment and a threaded segment; the mounting seat is arranged on the piston mounting section, and the mounting seat is rotationally arranged on the piston mounting section; the rear end of the bridge plate is fixedly connected with the mounting seat, and the bridge plate is parallel to the piston rod; one end of the sliding seat is connected with the bridge plates, and the bridge plates are in sliding fit with each other; and the dial indicator is installed on the sliding block, and the dial indicator is perpendicular to the bridge plate. The mud pump crosshead upper and lower guide plate centering gauge is simple in structure and low in manufacturing difficulty, can be quickly installed at the front end of a piston rod, and accurately measures the position accuracy of the piston rod in a reference hole.

Description

Technical Field

[0001] This utility model relates to the field of mud pump equipment, specifically to a centering gauge for the upper and lower guide plates of a mud pump crosshead. Background Technology

[0002] Working principle of mud pump: The rear is the crankshaft mechanism, the middle is the crosshead mechanism, and the front is the hydraulic end mechanism. The rear of the crosshead mechanism is connected to the crankshaft mechanism through the connecting rod, and the front is connected to the piston rod of the hydraulic end mechanism. The crankshaft drives the crosshead to move back and forth, and the crosshead then drives the piston to reciprocate in the cylinder liner of the hydraulic end through the piston rod, thereby continuously pumping and conveying mud or water and other flushing liquids.

[0003] In the crosshead mechanism, upper and lower guide plates are mounted on the mud pump frame, and the crosshead moves back and forth between the upper and lower guide plates. In the hydraulic end mechanism, a hydraulic cylinder mounting hole is opened at the front end of the mud pump frame, and the hydraulic cylinder of the hydraulic end is set in the mounting hole. The cylinder sleeve is fixedly connected to the hydraulic cylinder, and the piston rod of the hydraulic end is fixedly connected to the crosshead through a connecting rod. While the crosshead and piston rod move back and forth synchronously, it is necessary to ensure the positional accuracy of the crosshead between the upper and lower guide plates, and also to ensure the positional accuracy of the piston rod in the hydraulic cylinder mounting hole. This precision requirement greatly increases the difficulty of manufacturing the mud pump.

[0004] The current method for installing the crosshead mechanism and hydraulic end mechanism in a mud pump is as follows: First, select the hydraulic cylinder mounting hole as the reference hole. Then, the installation position of the upper and lower guide plates of the crosshead in the frame is adjustable. First, fix the crosshead and piston rod together. Then, install the crosshead between the upper and lower guide plates with the piston rod facing the hydraulic cylinder mounting hole. By detecting the positional accuracy of the piston rod in the reference hole (hydraulic cylinder mounting hole), that is, detecting whether the piston rod is in the center of the reference hole, the installation height of the upper and lower guide plates of the crosshead is adjusted according to the detection result of the piston rod, thereby adjusting the vertical height of the crosshead. Finally, adjust it until the piston rod is in the center position of the hydraulic cylinder mounting hole. After the piston rod is adjusted to the center of the hydraulic cylinder mounting hole, finally fix the upper and lower guide plates of the crosshead.

[0005] This new installation method requires the piston rod to be positioned in the cylinder mounting hole. Current inspection tools cannot quickly detect whether the piston rod is in the reference hole (cylinder mounting hole), which makes it impossible for operators to quickly adjust the installation position of the upper and lower guide plates of the crosshead, thus affecting the production efficiency and assembly accuracy of the mud pump. Utility Model Content

[0006] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a centering gauge for the upper and lower guide plates of the crosshead of a mud pump. This solves the problem that the previous gauges could not quickly and accurately detect whether the piston rod was in the reference hole (cylinder mounting hole), which made it impossible for operators to quickly adjust the installation position of the upper and lower guide plates of the crosshead, thus affecting the production efficiency of the mud pump.

[0007] The technical solution adopted by this utility model to solve its technical problem is:

[0008] A centering gauge for the upper and lower guide plates of a mud pump crosshead is provided, including...

[0009] A piston rod, wherein a piston mounting section is provided at the front end of the piston rod, and the piston mounting section includes a smooth rod section and a threaded section;

[0010] Mounting seat, the mounting seat is disposed in the piston mounting section, and the mounting seat is rotatably configured in the piston mounting section;

[0011] The bridge plate is fixedly connected to the mounting base at its rear end, and the bridge plate is parallel to the piston rod.

[0012] A slide block, one end of which is connected to a bridge plate, and the bridge plates slide together.

[0013] A dial indicator is mounted on a slider and is perpendicular to the bridge plate.

[0014] Furthermore, a bearing cavity is formed within the mounting base, and an inner retaining ring is formed on the inner side of the bearing cavity;

[0015] At least one ball bearing is provided, each ball bearing is disposed in a bearing cavity, and a spacer is provided between adjacent ball bearings, the spacer engaging with the inner ring of the adjacent ball bearing.

[0016] A cover plate, which is bolted to the outside of the mounting base, and the cover plate abuts against the outer ring of the outer ball bearing;

[0017] The piston mounting section extends through each ball bearing, and the mounting seat is rotatably mounted on the piston mounting section via each roller bearing;

[0018] A locking nut is provided on the piston mounting section, and the locking nut axially locks the ball bearing.

[0019] Furthermore, an inner gasket is provided between the rear ball bearing and the rear end face of the piston mounting section, and an outer gasket is provided between the front ball bearing and the lock nut.

[0020] Furthermore, a sliding groove is provided on the bridge plate, and a slider is provided at the lower end of the slide block, with the lower end of the slider inserted into the sliding groove;

[0021] A lower washer is provided below the bridge plate. The locking screw passes through the lower washer and connects to the slider, thereby locking the slider onto the bridge plate.

[0022] Furthermore, a handle is provided on the mounting base.

[0023] The beneficial effects of this utility model are:

[0024] This utility model relates to a centering gauge for the upper and lower guide plates of the crosshead of a mud pump. It has a simple structure, is easy to manufacture, and can be quickly installed at the front end of the piston rod to accurately measure the position accuracy of the piston rod in the reference hole.

[0025] Improve the convenience, stability, manufacturing efficiency, cost-effectiveness, and measurement accuracy of inspection tools. Attached Figure Description

[0026] The present invention will be further described below with reference to the accompanying drawings.

[0027] Figure 1 This is a perspective view of the gauge of this utility model on the piston rod;

[0028] Figure 2 This is a half-sectional view of the inspection tool of this utility model on the piston rod;

[0029] Figure 3 This is a diagram showing the fit between the slide and the bridge plate;

[0030] Figure 4 This is a half-section view of the area between the mounting base and the piston mounting section;

[0031] Figure 5 This is a schematic diagram of a mud pump;

[0032] Figure 6 This is a structural diagram of the crosshead assembly and its spacing;

[0033] in,

[0034] 1. Mounting base; 11. Ball bearing; 12. Spacer ring; 13. Inner retaining ring; 14. Cover plate; 15. Handle.

[0035] 21. Inner washer; 22. Outer washer; 23. Lock nut;

[0036] 3. Bridge plate; 31. Slide groove;

[0037] 4. Slide, 41. Lower washer;

[0038] 5. Dial gauge;

[0039] 6. Crosshead, 61. Intermediate tie rod, 62. Piston rod;

[0040] 71. Upper guide plate; 72. Lower guide plate;

[0041] 8. Hydraulic cylinder mounting hole. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0043] This application provides a centering fixture for the upper and lower guide plates of a mud pump crosshead, which will be described in detail below. It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments of this application. Furthermore, the descriptions of each embodiment have their own emphasis; parts not described in detail in a certain embodiment can be referred to in the relevant descriptions of other embodiments.

[0044] To address the technical problem in existing technologies where the gauge cannot quickly detect whether the piston rod 62 is in the reference hole (cylinder mounting hole), thus preventing operators from quickly adjusting the installation position of the upper and lower guide plates of the crosshead and affecting the manufacturing efficiency of the mud pump, an embodiment of this application provides a centering gauge for the upper and lower guide plates of the mud pump crosshead. This will be described in detail below.

[0045] The frame of the mud pump is equipped with a crosshead working chamber. An upper guide plate 71 and a lower guide plate 72 are installed at the upper and lower ends of the working chamber, respectively. The guide plates are used to cooperate with the crosshead 6. The guide plates have an arc-shaped structure. The crosshead 6 moves back and forth in the working chamber through the upper and lower guide plates.

[0046] The guide plate is connected to the frame by screws. The installation height of the guide plate can be adjusted by placing shims between the guide plate and the frame, which in turn can adjust the height of the crosshead 6 in the working chamber.

[0047] The crosshead 6 is fixedly connected to the piston rod 62 via the intermediate pull rod 61.

[0048] like Figures 1 to 4 As shown, a centering gauge for the upper and lower guide plates of a mud pump crosshead includes...

[0049] Piston rod 62, the piston rod 62 having a piston mounting section at its front end, the piston mounting section including a smooth rod section and a threaded section;

[0050] Mounting base 1, the mounting base 1 is disposed in the piston mounting section, and the mounting base 1 is rotatably disposed in the piston mounting section;

[0051] Bridge plate 3, the rear end of which is fixedly connected to mounting base 1, and bridge plate 3 is parallel to piston rod 62;

[0052] Slide 4, one end of which is connected to bridge plate 3, and slides between bridge plates 3;

[0053] Dial gauge 5 is mounted on the slider and is perpendicular to bridge plate 3.

[0054] Specifically, as an optional implementation method in this embodiment, such as Figures 1 to 4 As shown, a bearing cavity is formed inside the mounting base 1, and an inner retaining ring 13 is formed on the inner side of the bearing cavity;

[0055] Two ball bearings 11 are provided, each ball bearing 11 is disposed in a bearing cavity, and a spacer 12 is provided between adjacent ball bearings 11. The spacer 12 is engaged with the inner ring of the adjacent ball bearing 11.

[0056] Cover plate 14, which is bolted to the outside of mounting base 1, and abuts against the outer ring of outer ball bearing 11;

[0057] The piston mounting section extends through each ball bearing 11, and the mounting base 1 is rotatably mounted on the piston mounting section via each roller bearing.

[0058] A locking nut 23 is provided on the piston mounting section, and the locking nut 23 axially locks the ball bearing 11.

[0059] Specifically, as an optional implementation method in this embodiment, such as Figures 1 to 4 As shown, an inner gasket 21 is provided between the rear ball bearing 11 and the rear end face of the piston mounting section, and an outer gasket 22 is provided between the front ball bearing 11 and the locking nut 23.

[0060] The inner gasket 21 is provided on the piston mounting section to control the axial distance between the rear side of the mounting seat 1 and the piston rod 62, and to prevent interference between the rear side of the mounting seat 1 and the piston rod 62.

[0061] During operation, the cover plate 14, the outer rings of the two bearings, and the mounting base 1 rotate synchronously, while the inner ring of the bearing, the locking nut 23, the inner washer 21, and the outer washer 22 remain stationary in the piston mounting section.

[0062] Specifically, as an optional implementation method in this embodiment, such as Figures 1 to 4 As shown, a sliding groove 31 is provided on the bridge plate 3, and a slider is provided at the lower end of the slide block 4, with the lower end of the slider inserted into the sliding groove 31;

[0063] like Figure 3As shown, a lower washer 41 is provided below the bridge plate 3. The locking screw passes through the lower washer 41 and connects with the slider, thereby locking the slide block 4 onto the bridge plate 3.

[0064] Loosening the locking screw allows the slide 4 to move back and forth on the bridge plate 3. The slider is a rectangular block, which restricts the slide 4 from rotating on the bridge plate 3. The slide 4 is perpendicular to the bridge plate 3, ensuring that the dial indicator 5 on the slide 4 remains perpendicular to the bridge plate 3.

[0065] The slide rail 31 allows the slide block 4 and dial indicator 5 to be adjusted in the front and rear positions on the bridge plate 3 to meet the inspection requirements of the inspection fixture.

[0066] Specifically, as an optional implementation method in this embodiment, such as Figures 1 to 4 As shown, a handle 15 is provided on the mounting base 1. The handle 15 drives the piston rod 62 to rotate circumferentially, thereby causing the dial indicator 5 to rotate circumferentially within the reference hole, thus detecting whether the position of the piston rod 62 relative to the reference hole is accurate.

[0067] The piston rod 62 is part of the hydraulic end. After the piston head is installed on the front end of the piston rod 62, it is inserted into the cylinder liner of the hydraulic end. The piston rod 62 drives the piston head to move back and forth in the cylinder liner. The cylinder liner is fixed on the hydraulic cylinder, which is installed in the reference hole of the frame. Therefore, by judging the positional accuracy of the piston rod 62 relative to the center of the reference hole, the movement accuracy of the piston rod 62 driving the piston in the cylinder liner can be basically determined.

[0068] like Figure 5 The diagram shows a tool used to inspect the cylinder mounting hole 8 within the mud pump frame; as shown. Figure 6 As shown, the crosshead 6, the intermediate pull rod 61, and the piston rod 62 are connected as a single structure. The positional accuracy of the crosshead 6 in the hydraulic cylinder mounting hole 8 is checked by dial indicator 5, and then the position of the crosshead 6 between the upper guide plate 71 and the lower guide plate 72 is adjusted.

[0069] The gauge of this invention is used to detect whether the piston rod 62 is centered in the cylinder mounting hole 8. If it is not centered in the cylinder mounting hole 8, the operator will promptly add or remove shims in the installation gap of the upper guide plate 71 or lower guide plate 72 in the working chamber of the crosshead to adjust the height of the two guide plates, thereby adjusting the height of the crosshead 6. Since the piston rod 62 is fixed together with the crosshead 6, adjusting the height of the crosshead 6 is equivalent to adjusting the height of the piston rod 62. When the gauge detects that the piston rod 62 is centered in the cylinder mounting hole 8, the upper guide plate 71 and lower guide plate 72 are locked. Then, the gauge is removed from the front end of the piston rod 62, the piston head is reinstalled, and the cylinder body of the hydraulic cylinder is assembled and fixed in the cylinder mounting hole 8. At this time, the piston head and piston rod 62 are inserted into the cylinder body. Since the positional accuracy of the piston rod 62 relative to the cylinder mounting hole 8 has been detected in advance by the gauge, and the cylinder body is installed in the cylinder mounting hole 8 with high accuracy, the piston head will definitely be centered in the cylinder sleeve.

[0070] The method of using the inspection tool of this utility model is as follows:

[0071] The inner gasket 21, mounting base 1, and outer gasket 22 are sequentially fitted onto the piston mounting section of the piston rod 62. The mounting base 1 contains two roller bearings. The mounting base 1 is axially locked onto the piston rod 62 by the locking nut 23. During testing, the dial indicator 5 is located inside the cylinder mounting hole 8. By rotating the mounting base 1, the dial indicator 5 can be rotated inside the cylinder mounting hole 8. The piston rod 62 can be observed to be centered in the cylinder mounting hole 8 through the dial indicator 5.

[0072] The crosshead 6 moves back and forth on the guide plate during the operation of the mud pump. Therefore, during testing, it is necessary to adjust the position of the crosshead 6 in the guide plate and use a gauge to check the position of the piston rod 62 multiple times. When the crosshead 6 moves to the front end of the guide plate, the slide 4 needs to be moved backward on the bridge plate 3. This is because the crosshead 6, along with the piston rod 62 and the gauge, is positioned forward to prevent the dial indicator 5 from protruding from the cylinder mounting hole 8. When the crosshead 6 moves to the rear end of the guide plate, the slide 4 needs to be moved forward on the bridge plate 3. This is because the crosshead 6, along with the piston rod 62 and the gauge, is positioned backward to prevent the dial indicator 5 from not being inside the cylinder mounting hole 8.

[0073] The fixture has a simple structure and is installed directly using the piston mounting section of the piston rod 62. This piston mounting section is originally used to install the piston head, and now it is used directly to install the fixture. After installation, the fixture has high positional accuracy, convenient inspection, and high inspection efficiency.

[0074] While the operator quickly checks the positional accuracy of the piston rod 62 relative to the reference hole using a gauge, the operator also adjusts the installation height of the guide plates at both ends of the crosshead 6 in a timely manner. The improved inspection efficiency leads to an improvement in the assembly efficiency of the mud pump.

[0075] All the devices (parts whose specific structures are not specified) selected in this application are general standard parts or parts known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0076] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0077] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0078] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. Furthermore, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Additionally, the shown or discussed mutual couplings, direct couplings, or communication connections may be through some communication interfaces; indirect couplings or communication connections between devices or units may be electrical, mechanical, or other forms.

[0079] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0080] In addition, in the various embodiments of this utility model, each functional unit can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0081] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A centering gauge for the upper and lower guide plates of a mud pump crosshead, characterized in that, include A piston rod (62) is provided with a piston mounting section at its front end, the piston mounting section including a smooth rod section and a threaded section; Mounting seat (1), the mounting seat (1) is disposed in the piston mounting section, and the mounting seat (1) is rotatably disposed in the piston mounting section; The bridge plate (3) is fixedly connected to the mounting base (1) at its rear end, and the bridge plate (3) is parallel to the piston rod (62); A slide block (4) is connected at one end to a bridge plate (3), and the bridge plates (3) slide together. A dial indicator (5) is mounted on a slider and is perpendicular to the bridge plate (3).

2. The centering gauge for the upper and lower guide plates of the mud pump crosshead according to claim 1, characterized in that, A bearing cavity is formed inside the mounting base (1), and an inner retaining ring (13) is formed on the inner side of the bearing cavity; At least one ball bearing (11) is provided, each ball bearing (11) is disposed in a bearing cavity, and a spacer (12) is provided between adjacent ball bearings (11), the spacer (12) engaging with the inner ring of the adjacent ball bearing (11); Cover plate (14), the cover plate (14) is bolted to the outside of the mounting base (1), the cover plate (14) abuts against the outer ring of the outer ball bearing (11); The piston mounting section extends through each ball bearing (11), and the mounting base (1) is rotatably mounted on the piston mounting section via each roller bearing; A locking nut (23) is provided on the piston mounting section, and the locking nut (23) axially locks the ball bearing (11).

3. The centering gauge for the upper and lower guide plates of the mud pump crosshead according to claim 2, characterized in that, An inner gasket (21) is provided between the rear ball bearing (11) and the rear end face of the piston mounting section, and an outer gasket (22) is provided between the front ball bearing (11) and the locking nut (23).

4. The centering gauge for the upper and lower guide plates of the mud pump crosshead according to claim 1, characterized in that, The bridge plate (3) has a sliding groove (31), and the lower end of the slide block (4) is provided with a slider, the lower end of which is inserted into the sliding groove (31). The bridge plate (3) is provided with a lower washer (41) below it. The locking screw passes through the lower washer (41) and connects with the slider, thereby locking the slide (4) onto the bridge plate (3).

5. The centering gauge for the upper and lower guide plates of the mud pump crosshead according to claim 1, characterized in that, A handle (15) is provided on the mounting base (1).

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