Liquid injection device

Abstract

The utility model relates to a liquid injection device, and relates to the technical field of liquid level control. The liquid injection device comprises a vertical pipe, a cover plate, a liquid inlet pipe and a liquid level adjusting mechanism, the cover plate is arranged at the top of the vertical pipe, the liquid inlet pipe penetrates through the cover plate, a flow guide plate is arranged in the vertical pipe and located under the liquid inlet pipe, and a mounting hole for mounting the liquid level adjusting mechanism is formed in the inner wall of the vertical pipe. The liquid level adjusting mechanism comprises a cross rod, a floating ball, a connecting piece and a contact block, the cross rod is rotatably connected with the vertical pipe, the connecting piece and the floating ball are arranged at the two ends of the cross rod respectively, and the contact block is located above the top of the connecting piece and connected with an external water pump. After the liquid level in the vertical pipe is lowered, the floating ball descends to enable the transverse rod to rotate, the contact block above the connecting piece makes contact, an external water pump is triggered to inject liquid into the vertical pipe through the liquid inlet pipe, the liquid flowing into the vertical pipe from the liquid inlet pipe makes contact with the flow guide plate firstly instead of directly impacting the liquid level in the vertical pipe, the stability of the floating ball in the floating process is improved, and therefore the liquid injection precision is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to liquid level control technical field, in particular to a liquid injection device. BACKGROUND

[0002] Well control liquid level injection device is usually used in oil drilling or other downhole operation, for keeping the stability of well liquid level, preventing wellhead pressure from being too high or too low, thereby ensuring wellhead safety.

[0003] The Chinese patent with publication number CN210221205U discloses a kind of float ball device and liquid injection system, by setting liquid level reaches detection switch, can be moved to liquid level reaches detection switch at float ball mechanism, trigger liquid level reaches detection switch output liquid level reaches signal.But the defect of above-mentioned device is, liquid will impact liquid surface during liquid injection process, cause liquid surface disturbance, prone to detection switch false triggering, further cause that liquid injection precision is lower, influence downhole operation. UTILITY MODEL CONTENT

[0004] The utility model provides a kind of liquid injection device, by setting deflector, avoid liquid directly impacting liquid surface during liquid injection process, reduce liquid surface disturbance, improve liquid injection precision.

[0005] The utility model provides a kind of liquid injection device, including standpipe, apron, liquid inlet pipe and liquid level adjusting mechanism, the apron is set in the top of the standpipe, the liquid inlet pipe penetrates the apron, the inside of the standpipe is equipped with deflector, the deflector is located the lower side of the liquid inlet pipe, the inner wall of the standpipe is equipped with the mounting hole for the installation of the liquid level adjusting mechanism, the liquid level adjusting mechanism includes cross bar, float ball, connecting piece and contact block, the cross bar is rotatably connected with the standpipe, the connecting piece and the float ball are respectively arranged in the two ends of the cross bar, the contact block is located the top of the connecting piece, the contact block is connected with external water pump.

[0006] In one embodiment, the liquid level adjusting mechanism further includes a first spring, the two ends of the first spring are respectively connected with the connecting piece and the contact block.

[0007] In one embodiment, the connecting piece includes connecting rod and contact rod, the two ends of the connecting rod are respectively hinged with the contact rod and the cross bar, the end of the contact rod away from the connecting rod is connected with the first spring.

[0008] In one embodiment, the liquid level adjusting mechanism further includes counterweight and locking assembly arranged on the counterweight, the counterweight is sleeved on the surface of the cross bar and is slidably connected with the cross bar, the surface of the cross bar is equipped with a plurality of positioning holes, a plurality of the positioning holes are arranged along the length direction of the cross bar, the locking assembly can be inserted into the positioning hole to fix the counterweight on the cross bar.

[0009] In one embodiment, the locking assembly comprises a fixed tube, a second spring, a locking pin and a limiting plate, the fixed tube is arranged on the surface of the counterweight, one end of the locking pin is located outside the fixed tube, the other end of the locking pin can be inserted into the positioning hole, the limiting plate is sleeved on the surface of the locking pin and located inside the fixed tube, and the two ends of the second spring are connected with the limiting plate and the inner wall of the fixed tube respectively.

[0010] In one embodiment, the locking assembly further comprises a fixed shaft, the fixed shaft is arranged in the inner wall of the vertical pipe, and the fixed shaft penetrates through the horizontal rod.

[0011] In one embodiment, the liquid injection device further comprises a winding and unwinding mechanism, the winding and unwinding mechanism comprises a traction rope and a winding assembly, the winding assembly is arranged on the outer wall of the vertical pipe, one end of the flow guide plate is rotatably connected with the inner wall of the vertical pipe, one end of the traction rope is connected with the flow guide plate, and the other end of the traction rope penetrates through the vertical pipe and is connected with the winding assembly.

[0012] In one embodiment, the winding assembly comprises a motor and a roller, the roller is connected with the output end of the motor, and the traction rope can be wound on the surface of the roller.

[0013] In one embodiment, the winding assembly further comprises a pulley, the pulley is arranged on the inner wall of the vertical pipe, and the traction rope passes through the pulley.

[0014] In one embodiment, the cross section of the flow guide plate is arc-shaped, when the flow guide plate is horizontally placed, the height of both sides of the flow guide plate is higher than the height of the middle part of the flow guide plate.

[0015] Compared with the prior art, the advantages of the utility model lie in that when the liquid level in the vertical pipe is lowered, the floating ball is lowered to make the horizontal rod rotate, the connecting piece arranged at one end of the horizontal rod moves upward to contact the contact block above the connecting piece, the external water pump is triggered to inject liquid into the vertical pipe through the liquid inlet pipe, the liquid flowing into the vertical pipe from the liquid inlet pipe first contacts the flow guide plate instead of directly impacting the liquid level in the vertical pipe, so that the impact and disturbance on the liquid level in the injection process are reduced, the liquid level in the vertical pipe can be stably raised, the stability of the floating process of the floating ball is improved, and the injection precision is improved. When the liquid level in the vertical pipe reaches the preset height, the floating ball is raised to make the horizontal rod rotate again, the connecting piece is separated from the contact block, and the external water pump stops injecting liquid. The liquid injection device has the advantages of simple structure, few electronic components, high reliability and convenient subsequent maintenance. BRIEF DESCRIPTION OF DRAWINGS

[0016] The utility model will be described in more detail based on the embodiments and with reference to the drawings in the following.

[0017] Figure 1 is a perspective view of the liquid injection device in the embodiment of the utility model;

[0018] Figure 2 is Figure 1 is a perspective view after removing the top cover and the liquid inlet pipe;

[0019] Figure 3 is a schematic view of the internal structure of the liquid injection device in the embodiment of the utility model;

[0020] Figure 4 is a schematic view of the liquid level adjusting mechanism in the embodiment of the utility model;

[0021] Figure 5 is a schematic view of the locking assembly in the embodiment of the utility model;

[0022] Figure 6 is a schematic view of the retracting mechanism in the embodiment of the utility model.

[0023] Reference signs:

[0024] 1, vertical pipe; 2, cover plate; 3, liquid inlet pipe; 4, liquid level adjusting mechanism; 41, cross rod; 411, positioning hole; 42, floating ball; 43, connecting piece; 431, connecting rod; 432, contact rod; 44, contact block; 45, first spring; 46, counterweight; 47, locking assembly; 471, fixed pipe; 472, second spring; 473, locking pin; 474, limiting plate; 48, fixed shaft; 5, flow guide plate; 6, retracting mechanism; 61, traction rope; 62, winding assembly; 621, motor; 622, roller; 623, pulley; 7, hinge. DETAILED DESCRIPTION

[0025] The utility model will be further described below with reference to the drawings.

[0026] As Figure 1 and Figure 2 indicated, the liquid injection device of the embodiment of the utility model includes vertical pipe 1, cover plate 2, liquid inlet pipe 3 and liquid level adjusting mechanism 4, cover plate 2 is arranged at the top of vertical pipe 1, and liquid inlet pipe 3 penetrates cover plate 2. Figure 3 As Figure 4 indicated, the inside of vertical pipe 1 is provided with flow guide plate 5, flow guide plate 5 is located directly below liquid inlet pipe 3, and an installation hole for installing liquid level adjusting mechanism 4 is formed in the inner wall of vertical pipe 1. As Figure 4 indicated, liquid level adjusting mechanism 4 includes cross rod 41, floating ball 42, connecting piece 43 and contact block 44, cross rod 41 is rotatably connected with vertical pipe 1, connecting piece 43 and floating ball 42 are arranged at the two ends of cross rod 41 respectively, contact block 44 is located above the top of connecting piece 43, and contact block 44 is connected with an external water pump (not shown in the figure).

[0027] When the liquid level in the vertical pipe 1 is lowered, the float ball 42 is lowered to rotate the horizontal rod 41, the connecting piece 43 at one end of the horizontal rod 41 is moved upward to contact the contact block 44 above the connecting piece 43, triggering the external water pump to inject liquid into the vertical pipe 1 through the liquid inlet pipe 3. The liquid flowing into the vertical pipe 1 from the liquid inlet pipe 3 will first contact the flow guide plate 5 instead of directly impacting the liquid level in the vertical pipe 1, thereby reducing the impact and disturbance of the liquid injection process on the liquid level, allowing the liquid level in the vertical pipe 1 to rise smoothly, improving the stability of the float ball 42 during the floating process, and thus improving the liquid injection accuracy. When the liquid level in the vertical pipe 1 reaches the preset height, the float ball 42 is raised to rotate the horizontal rod 41 again, the connecting piece 43 is disengaged from the contact block 44, and the external water pump stops injecting liquid. The liquid injection device of the embodiment has a simple structure, fewer electronic components, high reliability, and convenient subsequent maintenance.

[0028] As shown in Figure 4 , the liquid level adjusting mechanism 4 further includes a first spring 45, both ends of the first spring 45 are connected with the connecting piece 43 and the contact block 44 respectively. The first spring 45 has a certain elastic force, and the connecting piece 43 and the contact block 44 need to overcome the elastic force of the first spring 45 to achieve contact, so that the process of the connecting piece 43 and the contact block 44 contacting is gradual. When the float ball 42 is lowered, the horizontal rod 41 will rotate smoothly and will not suddenly lose balance to cause the connecting piece 43 and the contact block 44 to approach and collide quickly, thereby more accurately reflecting the movement of the float ball 42 rising and falling with the liquid level.

[0029] Further, the connecting piece 43 includes a connecting rod 431 and a contact rod 432, both ends of the connecting rod 431 are hingedly connected with the contact rod 432 and the horizontal rod 41 respectively, and one end of the contact rod 432 away from the connecting rod 431 is connected with the first spring 45. When the horizontal rod 41 rotates, the movement trajectory of the end portion thereof is an arc rather than a straight up and down trajectory. If the connecting piece 43 is designed in an integral manner, the top trajectory of the connecting piece 43 will also be an arc rather than a straight line, on the one hand, a larger installation hole needs to be provided to provide more movement space, and on the other hand, it is not convenient to control the contact position of the connecting piece 43 and the contact block 44. The connecting piece 43 of the embodiment is designed in this segmented structure, and the two parts can rotate relative to each other, the connecting rod 431 and the horizontal rod 41 can also rotate relative to each other, allowing the contact rod 432 to move straight up and down, avoiding the occurrence of the above-mentioned adverse situations.

[0030] Further, the liquid level adjusting mechanism 4 further comprises a counterweight 46 and a locking assembly 47 arranged on the counterweight 46, the counterweight 46 is sleeved on the surface of the crossbar 41 and is in sliding connection with the crossbar 41, the surface of the crossbar 41 is provided with a plurality of positioning holes 411, the plurality of positioning holes 411 are arranged at intervals along the length direction of the crossbar 41, and the locking assembly 47 can be inserted into the positioning holes 411 to fix the counterweight 46 on the crossbar 41. By moving the counterweight 46, the setting position of the counterweight 46 on the crossbar 41 can be changed, and the locking assembly 47 can fix the position of the counterweight 46, so as to adjust the lever moment ratio and set the trigger liquid level of different depths to adapt to the needs of various well depths.

[0031] As shown in Figure 5 , the locking assembly 47 comprises a fixed tube 471, a second spring 472, a locking pin 473 and a limiting plate 474, the fixed tube 471 is arranged on the surface of the counterweight 46, one end of the locking pin 473 is located outside the fixed tube 471, the other end of the locking pin 473 can be inserted into the positioning hole 411, the limiting plate 474 is sleeved on the surface of the locking pin 473 and located inside the fixed tube 471, and the two ends of the second spring 472 are connected with the limiting plate 474 and the inner wall of the fixed tube 471 respectively. When the locking pin 473 is pulled outwards, the limiting plate 474 moves with the locking pin 473 and compresses the second spring 472, so that one end of the locking pin 473 is separated from the positioning hole 411, and at this time the counterweight 46 is unlocked with the crossbar 41, and the fixed position of the counterweight 46 can be changed. When it is needed to fix the counterweight 46, the locking pin 473 is released, and under the action of the elastic force of the second spring 472, the limiting plate 474 moves towards the crossbar 41 and drives the locking pin 473 to be inserted into the positioning hole 411. The elastic force of the second spring 472 can ensure that the locking pin 473 will not loosen, so as to avoid displacement of the counterweight 46 again.

[0032] As shown in Figure 4 , the locking assembly 47 further comprises a fixed shaft 48, the fixed shaft 48 is arranged in the inner wall of the vertical pipe 1, the fixed shaft 48 penetrates through the crossbar 41, and the crossbar 41 can move around the fixed shaft 48.

[0033] As shown in Figure 1 , Figure 3 , and Figure 6As shown, the liquid injection device in this embodiment also includes a take-up and release mechanism 6. The take-up and release mechanism 6 includes a traction rope 61 and a winding assembly 62. The winding assembly 62 is disposed on the outer wall of the vertical pipe 1. One end of the guide plate 5 is rotatably connected to the inner wall of the vertical pipe 1 via a hinge 7. One end of the traction rope 61 is connected to the guide plate 5, and the other end of the traction rope 61 passes through the vertical pipe 1 and is connected to the winding assembly 62. The take-up and release mechanism 6 can pull the guide plate 5 during the liquid injection process, improving the impact resistance of the guide plate 5. Furthermore, by adjusting the winding length of the traction rope 61, the setting angle of the guide plate 5 can be changed, thereby setting a suitable tilt angle according to different liquid characteristics to minimize the impact on the liquid surface during the liquid injection process.

[0034] Furthermore, the winding assembly 62 includes a motor 621 and a roller 622. The roller 622 is connected to the output end of the motor 621, and the traction rope 61 can be wound around the surface of the roller 622. The roller 622 can wind up a relatively long traction rope 61, thereby allowing the guide plate 5 to be adjusted over a wide range of angles. The motor 621 is a stepper motor, which can accurately control the length of winding and unwinding the traction rope 61, thus achieving accurate adjustment of the angle of the guide plate 5.

[0035] Furthermore, the winding assembly 62 also includes a pulley 623, which is disposed on the inner wall of the vertical tube 1, and the traction rope 61 passes around the pulley 623. The traction rope 61 needs to pass through the wall of the vertical tube 1. In order to avoid contact between the traction rope 61 and the vertical tube 1 and reduce friction, the pulley 623 can adjust the posture of the traction rope 61 and tighten the traction rope 61 to prevent the traction rope 61 from rubbing against the vertical tube 1.

[0036] like Figure 3 As shown, the cross-section of the guide plate 5 is arc-shaped. When the guide plate 5 is placed horizontally, the height of the two sides of the guide plate 5 is higher than the height of the middle part of the guide plate 5. This shape of the guide plate 5 can have a certain gathering effect on the liquid falling into the guide plate 5, so that more liquid flows out from the end of the guide plate 5 and guides the liquid to the inner wall of the vertical pipe 1, and flows down along the inner wall of the vertical pipe 1, further reducing the disturbance of the liquid surface during the injection process.

[0037] Although the present invention has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A liquid injection device characterized by comprising: The utility model provides a liquid level regulating mechanism, which comprises a vertical pipe, a cover plate, a liquid inlet pipe and a liquid level regulating mechanism, the cover plate is arranged on the top of the vertical pipe, the liquid inlet pipe penetrates the cover plate, the inside of the vertical pipe is provided with a flow guide plate, the flow guide plate is located directly below the liquid inlet pipe, a mounting hole for mounting the liquid level regulating mechanism is formed in the inner wall of the vertical pipe, the liquid level regulating mechanism comprises a horizontal rod, a floating ball, a connecting piece and a contact block, the horizontal rod is rotatably connected with the vertical pipe, the connecting piece and the floating ball are arranged at two ends of the horizontal rod respectively, the contact block is located above the top of the connecting piece, and the contact block is connected with an external water pump.

2. The liquid injection device according to claim 1, wherein The liquid level regulating mechanism further comprises a first spring, and two ends of the first spring are connected with the connecting piece and the contact block respectively.

3. The liquid injection device according to claim 2, wherein The connecting piece comprises a connecting rod and a contact rod, two ends of the connecting rod are hingedly connected with the contact rod and the horizontal rod respectively, and one end of the contact rod away from the connecting rod is connected with the first spring.

4. The liquid injection apparatus according to claim 1, wherein The liquid level regulating mechanism further comprises a counterweight and a locking assembly arranged on the counterweight, the counterweight is sleeved on the surface of the horizontal rod and is slidably connected with the horizontal rod, a plurality of positioning holes are formed in the surface of the horizontal rod, and the plurality of positioning holes are arranged at intervals along the length direction of the horizontal rod, and the locking assembly can be inserted into the positioning hole to fix the counterweight on the horizontal rod.

5. The liquid injection apparatus according to claim 4, wherein The locking assembly comprises a fixing tube, a second spring, a lock pin and a limiting plate, the fixing tube is arranged on the surface of the counterweight, one end of the lock pin is located outside the fixing tube, the other end of the lock pin can be inserted into the positioning hole, the limiting plate is sleeved on the surface of the lock pin and located inside the fixing tube, and two ends of the second spring are connected with the limiting plate and the inner wall of the fixing tube respectively.

6. The liquid injection apparatus according to claim 5, wherein The locking assembly further comprises a fixing shaft, and the fixing shaft is arranged in the inner wall of the vertical pipe and penetrates the horizontal rod.

7. The liquid injection apparatus according to claim 1, wherein The utility model further comprises a winding and unwinding mechanism, the winding and unwinding mechanism comprises a traction rope and a winding assembly, the winding assembly is arranged on the outer wall of the vertical pipe, one end of the traction rope is connected with the flow guide plate, and the other end of the traction rope penetrates the vertical pipe and is connected with the winding assembly.

8. The liquid injection device according to claim 7, wherein The winding assembly comprises a motor and a roller, the roller is connected with the output end of the motor, and the traction rope can be wound on the surface of the roller.

9. The liquid injection device according to claim 8, wherein The winding assembly further comprises a pulley, the pulley is arranged on the inner wall of the vertical pipe, and the traction rope passes through the pulley.

10. The liquid injection apparatus according to claim 1, wherein The cross section of the flow guide plate is arc-shaped, and when the flow guide plate is horizontally placed, the height of both sides of the flow guide plate is higher than the height of the middle part of the flow guide plate.

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