A position detection device for a reciprocating pump

Abstract

A position detection device for a reciprocating pump belongs to the technical field of reciprocating pump accessories. It is characterized in that: it includes a follower device and a detection element. A control part (901) is arranged on the follower device, and a pushing part cooperating with the control part (901) is arranged on the piston (16) of the reciprocating pump. The detection element is arranged on one side of the follower device. The position detection device of this reciprocating pump converts the detection of the piston position into the detection of the follower device, which is convenient for detection, eliminates the problem of false operation of the detection element caused by the medium in the pump body, makes the detection of the piston position more accurate, makes the reciprocating pump work more stably, and can avoid damage to the detection element caused by the medium in the pump body, improving the service life of the detection element.

Description

Technical Field

[0001] A position detection device for a reciprocating pump belongs to the technical field of reciprocating pump accessories. Background Art

[0002] A reciprocating pump is a conveying machine that directly provides energy to a liquid in the form of pressure energy through the reciprocating motion of a piston. It relies on the reciprocating motion of the piston to change the pressure inside the pump body to achieve the conveyance of the medium. For each reciprocation of the piston, the liquid is sucked and discharged once, which is called a working cycle.

[0003] During the working process of a reciprocating pump, it is necessary to detect the position of the piston in real time to ensure the normal operation of the reciprocating pump. Currently, the detection of the reciprocating pump piston is achieved through a photoelectric switch or a travel switch. When the reciprocating pump is working, the reciprocating speed of the piston is very fast, which makes it difficult for the piston to stop immediately. The photoelectric switch or the travel switch can only detect two states of the switch, and it is difficult for the photoelectric switch or the travel switch to correctly detect the position of the piston, which affects the detection of the working state of the reciprocating pump. In addition, the photoelectric switch or the travel switch is very prone to malfunction during use, and it is very easy to be damaged during the use process, making it very inconvenient to use. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: to overcome the deficiencies of the prior art and provide a position detection device for a reciprocating pump that can monitor the position of the piston in real time during the movement of the piston and has accurate detection.

[0005] The technical solution adopted by the present invention to solve its technical problems is: the position detection device for the reciprocating pump is characterized in that it includes a follower device and a detection element. A manipulation part is arranged on the follower device, a pushing part cooperating with the manipulation part is arranged on the piston of the reciprocating pump, and the detection element is arranged on one side of the follower device.

[0006] Preferably, the follower device includes a striker, the striker is arranged on one side of the piston, the manipulation part is arranged on the striker, the detection element is a displacement sensor for detecting the displacement of the striker, and the striker is connected with a reset element.

[0007] Preferably, the follower device includes a striker and a transmission shaft. The transmission shaft is arranged along the radial direction of the piston. The manipulation part is arranged on the striker. The striker and the transmission shaft are connected by a transmission mechanism, so that the transmission shaft rotates synchronously with the movement of the striker. The detection element is an angle sensor arranged on one side of the transmission shaft, and the striker or the transmission shaft is connected with a reset element.

[0008] Preferably, the transmission mechanism includes a gear and a rack that mesh with each other. The rack is arranged parallel to the piston, the rack is connected with the striker and moves synchronously with it, and the gear is coaxially installed on the transmission shaft and drives it to rotate synchronously.

[0009] Preferably, the transmission mechanism includes a boss provided on one side of the transmission shaft. The boss is arranged along the radial direction of the transmission shaft. The striking handle is provided on one side of the transmission shaft and drives the transmission shaft to rotate by means of the boss.

[0010] Preferably, the reset element is a reset spring. The reset spring is connected to the striking handle and pushes it to reset.

[0011] Preferably, the follower device further includes a bracket. The bracket is cylindrical. A long hole is provided on the side of the bracket facing the piston. The striking handle is slidably installed in the bracket, and the end of the operating part passes through the long hole and is connected to the striking handle.

[0012] Preferably, a limit bolt is provided on the bracket. The limit bolt is threadedly connected to the bracket. The striking handle is arranged between the limit bolt and the detection element.

[0013] Preferably, a movable flange is sleeved outside the piston, and the movable flange moves synchronously with the piston.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] 1. The position detection device of the present reciprocating pump converts the detection of the piston position into the detection of the follower device, which is convenient for detection, eliminates the problem of misoperation of the detection element caused by the medium in the pump body, makes the detection of the piston position more accurate, makes the reciprocating pump work more stably, and can avoid damage to the detection element caused by the medium in the pump body, thereby improving the service life of the detection element.

[0016] 2. The operating part of the striking handle moves with the piston and cooperates with the reset element, so that the movement synchronization of the striking handle and the piston is good. By detecting the striking handle with a displacement sensor, the position of the striking handle can be monitored in real time, and thus the real-time monitoring of the piston position is realized, and the detection result is accurate.

[0017] 3. The translation of the piston is converted into the rotation of the transmission shaft through the striking handle, which is convenient for precise control of the piston position. Description of the Drawings

[0018] Figure 1 It is a front view sectional schematic diagram of the position detection device of the reciprocating pump.

[0019] Figure 2 It is Figure 1 The partial enlarged view at A in

[0020] Figure 3 It is a left view sectional schematic diagram of the gear and rack meshing.

[0021] Figure 4 It is a top view schematic diagram after the angle sensor 6 is installed.

[0022] Figure 5is Figure 3 The partial enlarged view at position B in

[0023] Figure 6 The front view schematic diagram of the position detection device of the reciprocating pump in Embodiment 2.

[0024] Figure 7 is Figure 6 The partial enlarged view at position C in

[0025] In the figure: 1. Adjusting bolt, 2. Adjusting nut, 3. Gear seat, 4. Pressure plate, 5. Support sleeve, 6. Angle sensor, 7. Coupling, 8. Front bracket, 9. Bumping handle, 901. Operating part, 10. Rear bracket, 11. Limit nut, 12. Limit bolt, 13. Connecting frame, 14. Moving flange, 15. Locking screw, 16. Piston, 17. Transmission shaft, 18. Rack, 19. Return spring, 20. Gear. Specific embodiments

[0026] Figures 1 to 5 is the best embodiment of the present invention. The following will further describe the present invention in conjunction with the attached Figures 1 to 7 drawings.

[0027] A position detection device for a reciprocating pump includes a follower device and a detection device. An operating part 901 is arranged on the follower device, and a pushing part cooperating with the operating part 901 is arranged on the piston 16 of the reciprocating pump. The detection device is arranged on one side of the follower device. The position detection device of this reciprocating pump converts the detection of the position of the piston 16 into the detection of the follower device, which is convenient for detection, eliminates the problem of misoperation of the detection element caused by the medium in the pump body, makes the detection of the position of the piston 16 more accurate, makes the reciprocating pump work more stably, and can avoid damage to the detection element caused by the medium in the pump body, and improves the service life of the detection element.

[0028] The following will further describe the present invention in conjunction with specific embodiments. However, those skilled in the art should understand that the detailed description given here in conjunction with the drawings is for better explanation. The structure of the present invention necessarily exceeds these limited embodiments, and for some equivalent replacement schemes or common means, no detailed description will be given herein, but they still fall within the protection scope of this application.

[0029] Embodiment 1

[0030] As Figures 1 to 5As shown: The position detection device of this reciprocating pump further includes a gear seat 3 and a bracket. The gear seat 3 is detachably installed on the upper side of the pump body. The bracket is installed on one side of the gear seat 3, and the follower device is installed between the gear seat 3 and the bracket. The bracket includes a front bracket 8 and a rear bracket 10. The front bracket 8 is arranged between the rear bracket 10 and the gear seat 3. One end of the front bracket 8 is detachably connected to the gear seat 3, and the other end is detachably connected to the rear bracket 10.

[0031] Both the front bracket 8 and the rear bracket 10 are horizontally arranged cylindrical shapes. The gear seat 3 is also provided with a horizontal through hole. The horizontal through hole on the gear seat 3 is coaxially arranged with the inner holes of the front bracket 8 and the rear bracket 10 to form a guiding hole, and the guiding hole is horizontally arranged. The gear seat 3 is further provided with a vertical detection hole, which is vertically arranged. The lower end of the detection hole is communicated with the guiding hole, and the axis of the detection hole intersects with the axis of the guiding hole.

[0032] In this embodiment, the follower device includes a striking handle 9 and a transmission shaft 17. The length of the striking handle 9 is less than the length of the guiding hole, and the striking handle 9 is slidably installed in the guiding hole. A long hole is provided on the lower side of the front bracket 8. The lower end of the operating portion 901 passes through the through hole provided on the connecting frame 13 and extends into the connecting frame 13, and the upper end passes through the long hole and is integrally connected to the striking handle 9 and moves synchronously with the striking handle 9. The transmission shaft 17 is vertically arranged in the detection hole. The transmission shaft 17 is rotatably connected to the detection hole. The lower end of the transmission shaft 17 is connected to the striking handle 9 through a transmission mechanism, thereby converting the axial movement of the striking handle 9 into the rotation of the transmission shaft 17. In this embodiment, the detection element is an angle sensor 6, and the angle sensor 6 is arranged on the upper side of the transmission shaft 17 and monitors the angle rotated by the transmission shaft 17 in real time. The detection element can also be an encoder.

[0033] In this embodiment, the transmission mechanism includes a gear 20 and a rack 18. The rack 18 is horizontally arranged. The rack 18 is slidably arranged in the guiding hole. The rack 18 is arranged on the left side of the striking handle 9. The rack 18 is connected to the striking handle 9 and moves synchronously with it. The gear 20 is coaxially sleeved outside the transmission shaft 17, and the gear 20 drives the transmission shaft 17 to rotate synchronously. The rack 18 meshes with the gear 20, thereby converting the linear movement of the striking handle 9 into the rotation of the transmission shaft 17, and the transmission between the rack 18 and the gear 20 is precise, enabling the movement of the piston 16 to be precisely converted into the rotation of the transmission shaft 17.

[0034] The reset component is a reset spring 19. An adjusting bolt 1 is arranged on the left side of the gear seat 3. The left end of the guiding hole is threaded. The end of the adjusting bolt 1 extends into the left end of the guiding hole and is threadedly connected to the gear seat 3. An adjusting nut 2 for fastening the adjusting bolt 1 is arranged on the adjusting bolt 1. The reset spring 19 is arranged between the adjusting bolt 1 and the rack 18. One end of the reset spring 19 is supported on the end of the adjusting bolt 1, and the other end is supported on the end of the rack 18. And the reset spring 19 is in a compressed state. The reset spring 19 pushes the striker 9 to move rightward for reset. The elastic force of the reset spring 19 can be adjusted by the adjusting bolt 1, avoiding the influence of insufficient elastic force of the reset spring 19 on the monitoring accuracy, and the adjustment is convenient.

[0035] A limiting bolt 12 is arranged on the right side of the rear support 10. The right end of the guiding hole is threaded. The end of the limiting bolt 12 extends into the right end of the guiding hole and is threadedly connected to the rear support 10. The right end of the striker 9 is supported on the limiting bolt 12, thus realizing the limitation of the striker 9. A limiting nut 11 for locking the limiting bolt 12 is arranged on the limiting bolt 12. The right stop point of the stroke of the striker 9 can be adjusted by the limiting bolt 12, and then the starting detection point of the position of the piston 16 can be adjusted, and the detection is convenient.

[0036] A pressing plate 4 and a support sleeve 5 are arranged on the upper side of the gear seat 3. The pressing plate 4 is in the shape of a closed cylinder at the lower end. An annular connecting part is arranged around the outer side of the lower end of the pressing plate 4. The connecting part of the pressing plate 4 is detachably connected to the gear seat 3 by bolts. A through hole is arranged on the closed end of the pressing plate 4. The outer diameter of the lower part of the support sleeve 5 is smaller than that of the upper part. The outer diameter of the lower part of the support sleeve 5 is inserted into the upper through hole of the pressing plate 4. A locking screw for locking between the support sleeve 5 and the pressing plate 4 is arranged on the pressing plate 4. The locking screw is arranged along the radial direction of the pressing plate 4. The angle sensor 6 is installed on the upper side of the support sleeve 5, facilitating the connection of the angle sensor 6. The upper end of the transmission shaft 17 passes through the through hole of the closed end of the pressing plate 4 and then extends into the support sleeve 5.

[0037] A flange is arranged on the lower side of the angle sensor 6. The angle sensor 6 is connected to the support sleeve 5 through the flange. The angle sensor 6 is connected to the transmission shaft 17 through a coupling 7. A radial operation hole is arranged on the support sleeve 5. The coupling 7 can be locked or loosened through the operation hole, facilitating the zero adjustment of the angle sensor 6.

[0038] A movable flange 14 is coaxially sleeved on the piston 16. A locking screw 15 is arranged between the movable flange 14 and the piston, thus ensuring the synchronous movement of the movable flange 14 and the piston 16. The movable flange 14 pushes the striker 9 to move through the operating part 901.

[0039] The working process of the position detection device of this reciprocating pump is as follows: When the piston 16 moves to the left, when it moves to the point where the moving flange 14 contacts the control part 901, the striker 9 moves synchronously with the piston 16, the rack 18 moves synchronously with the striker 9, and drives the gear 20 to rotate. The transmission shaft 17 is connected to the angle sensor 6 through the coupling 7. The angle sensor 6 monitors the angle rotated by the transmission shaft 17 in real time, thereby realizing the real-time monitoring of the position of the piston 16, achieving the real-time monitoring of the position of the piston 16, and ensuring the stable operation of the reciprocating pump.

[0040] Embodiment 2

[0041] As Figures 6 to 7 shown: The difference between Embodiment 2 and Embodiment 1 is that the transmission mechanism includes a boss provided on one side of the transmission shaft 17. The boss is arranged along the radial direction of the transmission shaft 17, and the boss is arranged at the lower part of the transmission shaft 17. The end of the striker 9 pushes the transmission shaft 17 to rotate through the boss.

[0042] Embodiment 3

[0043] The difference between Embodiment 3 and Embodiment 1 is that the follower device only includes the striker 9, and the detection element is a displacement sensor or an encoder. The detection element is installed on the gear seat 3 and monitors the displacement of the striker 9 in real time, thereby realizing the real-time monitoring of the position of the piston 16.

[0044] The above are only the preferred embodiments of the present invention, and are not limitations to the present invention in other forms. Any person skilled in the art may use the technical content disclosed above to make changes or modifications into equivalent embodiments with equivalent changes. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the technical solution content of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims

1. A position detection device for a reciprocating pump, characterized in that: It includes a follow-up device and a detection element. A manipulation part (901) is arranged on the follow-up device, a pushing part cooperating with the manipulation part (901) is arranged on the piston (16) of the reciprocating pump, and the detection element is arranged on one side of the follow-up device; The position detection device further includes a gear seat (3). The gear seat (3) is detachably installed on the upper side of the pump body. The follow-up device includes a striking handle (9) and a transmission shaft (17). The transmission shaft (17) is arranged along the radial direction of the piston (16). The follow-up device further includes a bracket. The bracket is installed on one side of the gear seat (3). The bracket is cylindrical. A long hole is arranged on the side of the bracket facing the piston. The striking handle (9) is slidably installed in the bracket. The end of the manipulation part (901) passes through the long hole and is connected to the striking handle (9). A movable flange (14) is sleeved outside the piston (16). The movable flange (14) moves synchronously with the piston (16). The movable flange (14) pushes the striking handle (9) to move through the manipulation part (901); A transmission mechanism is connected between the striking handle (9) and the transmission shaft (17) to make the transmission shaft (17) rotate synchronously with the movement of the striking handle (9). The detection element is an angle sensor (6) arranged on one side of the transmission shaft (17). The striking handle (9) or the transmission shaft (17) is connected with a reset element.

2. The position detection device of the reciprocating pump according to claim 1, characterized in that: The transmission mechanism includes a meshing gear (20) and a rack (18). The rack (18) is arranged parallel to the piston (16). The rack (18) is connected to the striking handle (9) and moves synchronously with it. The gear (20) is coaxially installed on the transmission shaft (17) and drives it to rotate synchronously.

3. The position detection device of the reciprocating pump according to claim 1, characterized in that: The transmission mechanism includes a boss arranged on one side of the transmission shaft (17). The boss is arranged along the radial direction of the transmission shaft (17). The striking handle (9) is arranged on one side of the transmission shaft (17) and pushes the transmission shaft (17) to rotate through the boss.

4. The position detection device of the reciprocating pump according to claim 1, characterized in that: The reset element is a reset spring (19). The reset spring (19) is connected to the striking handle (9) and pushes it to reset.

5. The position detection device of the reciprocating pump according to claim 1, wherein: A limit bolt (12) is arranged on the bracket. The limit bolt (12) is threadedly connected to the bracket. The striking handle (9) is arranged between the limit bolt and the detection element.

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