Air tightness detection device of oil gas recovery detector

Abstract

The utility model belongs to the technical field of oil gas recovery detection, and discloses an air tightness detection device of an oil gas recovery detector, the air tightness detection device comprises a main pipeline arranged in a shell, the main pipeline is provided with a pressure generator, an early warning mechanism comprises a mounting cavity formed in a piston, and an early warning plate is slidably connected in the mounting cavity. An inclined face is arranged on the side wall of the early warning plate, a mounting ring is fixedly connected to the end, away from the cylinder, of the sealing ring, the inclined face slides at the other end of the mounting ring, and a proximity sensor is arranged at the end, close to the main pipeline, of the early warning plate. According to the gas tightness detection device of the oil gas recovery detector, through the arrangement of the early warning mechanism, under the pushing action of the pushing mechanism, automatic compensation is carried out on abrasion of the sealing ring, so that the sealing effect between the sealing ring and the inner wall of the cylinder body is guaranteed, and meanwhile the gas tightness of the oil gas recovery detector is detected through the detection action of a proximity sensor. And timely early warning is carried out on the sealing ring which is seriously abraded.

Description

Technical Field

[0001] The utility model relates to the technical field of oil and gas recovery detection, in particular to an air tightness detection device of an oil and gas recovery detector. Background Art

[0002] The measurement results of the oil and gas recovery detector depend on the air tightness of the instrument. If there is a leak in the instrument, the gas in the external environment may enter the instrument, resulting in inaccurate measurement results. Therefore, the oil and gas recovery detector needs to be tested for air tightness before use to ensure the accuracy of the measurement results.

[0003] A Chinese utility model patent with publication number CN 219064801U5 discloses an air tightness detection device for an oil and gas recovery detector. The control system continuously starts the motor to rotate forward, causing the piston to move downward, gradually increasing the air pressure in the main pipeline until the air pressure in the main pipeline is greater than 1245Pa. The motor is then stopped to maintain the position of the piston unchanged, thereby maintaining the air pressure components in the main pipeline and waiting for the specified time to detect in order to determine the air tightness of the oil and gas recovery detector itself.

[0004] With respect to the above-mentioned related technologies, the inventor believes that there are the following defects:

[0005] The air pressure in the main pipeline is increased or decreased by moving the piston up and down in the cylinder. Although the overall operation is relatively simple, in order to improve the sealing performance of the piston and prevent oil or gas from leaking from the gap between the piston and the inner wall of the cylinder during use, a sealing ring is installed on the side wall of the piston. The multiple up and down movements of the piston cause the sealing ring to continuously contact and rub against the inner wall of the cylinder, resulting in wear of the sealing ring material. In addition, if the lubrication between the sealing ring and the inner wall of the cylinder is insufficient, the degree of wear will be further increased. Since the sealing ring is installed inside the cylinder, it is difficult to grasp the overall wear of the sealing ring, making it difficult to replace the severely worn sealing ring in time, thereby affecting the piston's response to the change in the air pressure in the main pipeline, further reducing the accuracy and sensitivity of the air tightness detection of the oil and gas recovery detector. Utility Model Content

[0006] In order to solve the above problems, the utility model provides an air tightness detection device for an oil and gas recovery detector.

[0007] The above technical objectives of the utility model are achieved through the following technical solutions: an air tightness detection device for an oil and gas recovery detector, comprising a main pipeline arranged in a housing, a pressure generator arranged on the main pipeline, the pressure generator consisting of a cylinder and a piston arranged in the cylinder, a sealing ring is installed on the piston through a mounting groove, and an early warning mechanism for early warning of wear of the sealing ring is provided on the piston;

[0008] The early warning mechanism includes an installation cavity opened on the piston, an early warning plate is slidably connected in the installation cavity, an inclined surface is opened on the side wall of the early warning plate, an installation ring is fixedly connected to the end of the sealing ring away from the cylinder, and the inclined surface slides on the other end of the installation ring, a proximity sensor is provided at the end of the early warning plate close to the main pipeline, and the detection end of the proximity sensor is arranged opposite to the bottom wall of the installation cavity, and a pushing mechanism for pushing the early warning plate is provided on the piston.

[0009] By adopting the above technical solution, a timely warning can be given to the sealing ring with severe wear.

[0010] Furthermore, two guide rods symmetrically arranged with respect to each other are fixedly connected between two opposite inner walls of the installation cavity, and the early warning plate slides on the side walls of the two guide rods.

[0011] By adopting the above technical solution, a guiding and limiting function is provided for the movement of the early warning board.

[0012] Furthermore, the pushing mechanism includes a pushing rod slidably connected to the piston, one end of the pushing rod is connected to the early warning plate, a plurality of counterweight rings are connected to the pushing rod via a connecting assembly, and the pushing rod is provided with an extrusion assembly for extruding each counterweight ring.

[0013] By adopting the above technical solution, the wear of the sealing ring is automatically compensated.

[0014] Furthermore, the connecting assembly includes a plurality of spline grooves formed on the side wall of the push rod, each of the spline grooves is slidably connected with a spline block, and one end of each of the spline blocks is connected to the inner wall of the counterweight ring.

[0015] By adopting the above technical solution, a limiting effect is provided for the installation of the counterweight ring on the push rod.

[0016] Furthermore, the extrusion assembly includes a threaded hole opened on the other end of the push rod, a connecting rod is threadedly connected to the threaded hole, an end of the connecting rod away from the push rod is fixedly connected to an extrusion plate, and the side of the extrusion plate close to the counterweight ring is connected to an extrusion ball through multiple tightening assemblies.

[0017] By adopting the above technical solution, the position stability of the counterweight ring on the push rod is ensured.

[0018] Furthermore, the clamping assembly includes a clamping tube fixedly connected to the side of the extrusion plate close to the counterweight ring, a clamping rod slidably connected to the clamping tube, one end of the clamping rod is connected to the extrusion ball, one end of the clamping rod located inside the clamping tube is fixedly connected to the clamping plate, the other side of the clamping plate is fixedly connected to a spring, and the other end of the spring is connected to the bottom wall of the clamping tube.

[0019] By adopting the above technical solution, the elastic force of the spring is utilized to push the extrusion ball against the side wall of the counterweight ring.

[0020] Furthermore, the cylinder is provided with a driving mechanism for driving the piston, and the driving mechanism includes two driving tubes symmetrically arranged and slidably connected in the cylinder, one end of the two driving tubes is connected to the piston, one of the two driving tubes is slidably connected with a driving rod, one end of the driving rod is connected to the inner wall of the cylinder, and the other of the two driving tubes is threadedly connected with a threaded rod. A motor is provided at the end of the cylinder away from the main pipeline, and the output end of the motor is connected to the threaded rod.

[0021] By adopting the above technical solution, the piston will be driven to move up and down in the cylinder.

[0022] In summary, the utility model has the following beneficial effects:

[0023] The air tightness detection device of the oil and gas recovery detector of the present application, through the setting of the early warning mechanism, automatically compensates for the wear of the sealing ring under the pushing action of the pushing mechanism, thereby ensuring the sealing effect between the sealing ring and the inner wall of the cylinder, while utilizing the detection function of the proximity sensor to provide timely early warning for the severely worn sealing ring, thereby ensuring the timely replacement of the severely worn sealing ring, and further improving the accuracy and sensitivity of the air tightness detection of the oil and gas recovery detector. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0025] Figure 2 This is a schematic diagram of the internal structure of the cylinder of an embodiment of the utility model;

[0026] Figure 3 It is a schematic diagram of the internal structure of the early warning mechanism of the embodiment of the utility model;

[0027] Figure 4 yes Figure 3 A magnified schematic diagram of center A.

[0028] In the figure: 101, shell; 102, main pipeline; 103, cylinder; 104, piston; 105, sealing ring; 201, installation cavity; 202, warning plate; 203, inclined plane; 204, installation ring; 205, proximity sensor; 3, guide rod; 501, push rod; 502, counterweight ring; 6, spline groove; 701, threaded hole; 702, connecting rod; 703, extrusion plate; 704, extrusion ball; 801, tightening tube; 802, tightening rod; 803, tightening plate; 804, spring; 901, drive tube; 902, drive rod; 903, threaded rod; 904, motor. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application; obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application without making creative work are within the scope of protection of the present application.

[0030] Example 1

[0031] See also Figure 1-Figure 4 , an air tightness detection device of an oil and gas recovery detector shown in the figure comprises a main pipeline 102 arranged in a housing 101, a pressure generator is arranged on the main pipeline 102, the pressure generator is composed of a cylinder 103 and a piston 104 arranged in the cylinder 103, a sealing ring 105 is installed on the piston 104 through a mounting groove, and an early warning mechanism for early warning of wear of the sealing ring 105 is arranged on the piston 104;

[0032] The early warning mechanism includes an installation cavity 201 provided on the piston 104, an early warning plate 202 is slidably connected in the installation cavity 201, an inclined surface 203 is provided on the side wall of the early warning plate 202, an end of the sealing ring 105 away from the cylinder 103 is fixedly connected with an installation ring 204, the installation ring 204 is made of a flexible material and has good deformation ability, the inclined surface 203 slides on the other end of the installation ring 204, a proximity sensor 205 is provided at one end of the early warning plate 202 close to the main pipeline 102, the detection end of the proximity sensor 205 is arranged opposite to the bottom wall of the installation cavity 201, and a pushing mechanism for pushing the early warning plate 202 is provided on the piston 104;

[0033] It should be noted here that: through the setting of the early warning mechanism, under the pushing action of the pushing mechanism, the wear of the sealing ring 105 is automatically compensated, thereby ensuring the sealing effect between the sealing ring 105 and the inner wall of the cylinder 103. At the same time, the detection function of the proximity sensor 205 is utilized to timely warn the severely worn sealing ring 105, thereby ensuring the timeliness of the replacement of the severely worn sealing ring 105, and further improving the accuracy and sensitivity of the air tightness detection of the oil and gas recovery detector.

[0034] It is worth noting that: this application is an improvement on the prior art. For the working principle and specific operating steps of the air tightness detection of the oil and gas recovery detector, please refer to the air tightness detection device of the oil and gas recovery detector with publication number CN 219064801U5, which will not be elaborated here.

[0035] See also Figure 3 , two mutually symmetrically arranged guide rods 3 are fixedly connected between two opposite inner walls of the installation cavity 201 shown in the figure, and the warning plate 202 slides on the side walls of the two guide rods 3;

[0036] It should be noted here that the guide rod 3 is provided to provide guidance and limit functions for the movement of the warning plate 202 .

[0037] See also Figure 3 The pushing mechanism shown in the figure includes a pushing rod 501 slidably connected to the piston 104, one end of the pushing rod 501 is connected to the warning plate 202, a plurality of counterweight rings 502 are connected to the pushing rod 501 through a connecting assembly, and an extrusion assembly for extruding each counterweight ring 502 is provided on the pushing rod 501;

[0038] It should be noted here that: by setting the pushing mechanism, the warning plate 202 can maintain a constant squeezing force on the sealing ring 105, thereby automatically compensating for the wear of the sealing ring 105 and ensuring the sealing effect between the sealing ring 105 and the inner wall of the cylinder 103.

[0039] See also Figure 4 The connecting assembly shown in the figure includes a plurality of spline grooves 6 provided on the side wall of the push rod 501, each spline groove 6 is slidably connected with a spline block, and one end of each spline block is connected to the inner wall of the counterweight ring 502;

[0040] It should be noted here that: through the setting of the connecting assembly, a limiting effect is provided for the installation of the counterweight ring 502 on the push rod 501.

[0041] It is worth noting that the counterweight ring 502 close to the piston 104 is limited by the counteraction between the spline block and the bottom wall of the spline groove 6.

[0042] Working principle: in the process of realizing the change of air pressure in the main pipeline 102 by moving the piston 104 up and down in the cylinder 103, the sealing ring 105 will be driven to rub against the inner wall of the cylinder 103 continuously. Under the action of friction, the sealing ring 105 will be worn continuously. At this time, under the gravity of multiple counterweight rings 502 and the guiding action of the guide rod 3, the early warning plate 202 will be pushed to move synchronously with the wear of the sealing ring 105. In the process of the movement of the early warning plate 202, the interaction force between the inclined surface 203 and the mounting ring 204 will push the sealing ring 105 and the inner wall of the cylinder 103 to be tightly against each other, thereby automatically compensating for the wear of the sealing ring 105 and ensuring the sealing effect between the sealing ring 105 and the inner wall of the cylinder 103.

[0043] And as the early warning plate 202 continues to move downward, when the proximity sensor 205 on the early warning plate 202 approaches the bottom wall of the installation cavity 201, the proximity sensor 205 will be triggered. At this time, the proximity sensor 205 will send an electrical signal to the controller, and under the control of the controller, an alarm signal will be issued to warn the operator, indicating that the sealing ring 105 needs to be replaced, thereby ensuring the timely replacement of the severely worn sealing ring 105, and further ensuring the piston 104 to the change of the air pressure in the main pipeline 102, thereby improving the accuracy and sensitivity of the air tightness detection of the oil and gas recovery detector.

[0044] Example 2

[0045] See also Figure 4 This embodiment further illustrates Example 1. The extrusion assembly shown in the figure includes a threaded hole 701 formed on the other end of the push rod 501. A connecting rod 702 is threadedly connected to the threaded hole 701. An extrusion plate 703 is fixedly connected to one end of the connecting rod 702 away from the push rod 501. A side of the extrusion plate 703 close to the counterweight ring 502 is connected to an extrusion ball 704 through a plurality of abutting assemblies.

[0046] It should be noted here that: through the setting of the extrusion component, under the pressing action of the pressing component, the extrusion ball 704 is pressed against the side wall of the counterweight ring 502, so that under the extrusion action of the extrusion ball 704, the position stability of the counterweight ring 502 on the push rod 501 is guaranteed.

[0047] See also Figure 4The tightening assembly shown in the figure includes a tightening tube 801 fixedly connected to the side of the extrusion plate 703 close to the counterweight ring 502, a tightening rod 802 is slidably connected to the tightening tube 801, one end of the tightening rod 802 is connected to the extrusion ball 704, one end of the tightening rod 802 located inside the tightening tube 801 is fixedly connected to the tightening plate 803, the other side of the tightening plate 803 is fixedly connected to a spring 804, and the other end of the spring 804 is connected to the bottom wall of the tightening tube 801;

[0048] It should be noted here that: by setting the pressing assembly, the elastic force of the spring 804 is utilized to push the squeezing ball 704 against the side wall of the counterweight ring 502 .

[0049] Example 3

[0050] See also Figure 2 , this embodiment is a further explanation of other embodiments. The cylinder 103 shown in the figure is provided with a driving mechanism for driving the piston 104. The driving mechanism includes two driving tubes 901 symmetrically arranged and slidably connected in the cylinder 103. One end of the two driving tubes 901 is connected to the piston 104. One of the two driving tubes 901 is slidably connected with a driving rod 902. One end of the driving rod 902 is connected to the inner wall of the cylinder 103. The other of the two driving tubes 901 is threadedly connected with a threaded rod 903. A motor 904 is provided at one end of the cylinder 103 away from the main pipeline 102. The output end of the motor 904 is connected to the threaded rod 903.

[0051] It should be noted here that: through the setting of the driving mechanism, when the motor 904 drives the threaded rod 903 to rotate, the piston 104 will be driven to move up and down in the cylinder 103 through the threaded engagement transmission action of the threaded rod 903 and the driving tube 901 and the guiding action of the driving rod 902, thereby realizing the change of the air pressure in the main pipeline 102 through the up and down movement of the piston 104.

[0052] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. An air tightness detection device for an oil and gas recovery detector, comprising a main pipeline (102) arranged in a housing (101), a pressure generator being arranged on the main pipeline (102), the pressure generator being composed of a cylinder (103) and a piston (104) arranged in the cylinder (103), a sealing ring (105) being installed on the piston (104) through an installation groove, wherein: The piston (104) is provided with an early warning mechanism for early warning of wear of the sealing ring (105); The early warning mechanism comprises an installation cavity (201) provided on the piston (104), an early warning plate (202) being slidably connected in the installation cavity (201), an inclined surface (203) being provided on the side wall of the early warning plate (202), an installation ring (204) being fixedly connected to one end of the sealing ring (105) away from the cylinder (103), the inclined surface (203) sliding on the other end of the installation ring (204), a proximity sensor (205) being provided at one end of the early warning plate (202) close to the main pipeline (102), a detection end of the proximity sensor (205) being arranged opposite to the bottom wall of the installation cavity (201), and a pushing mechanism for pushing the early warning plate (202) being provided on the piston (104).

2. The air tightness detection device of the oil and gas recovery detector according to claim 1 is characterized in that: Two mutually symmetrically arranged guide rods (3) are fixedly connected between two opposite inner walls of the installation cavity (201), and the early warning plate (202) slides on the side walls of the two guide rods (3).

3. The air tightness detection device of the oil and gas recovery detector according to claim 1 is characterized in that: The pushing mechanism comprises a pushing rod (501) slidably connected to the piston (104), one end of the pushing rod (501) being connected to the warning plate (202), a plurality of counterweight rings (502) being connected to the pushing rod (501) via a connecting assembly, and an extrusion assembly for extruding each counterweight ring (502) is provided on the pushing rod (501).

4. The air tightness detection device of the oil and gas recovery detector according to claim 3 is characterized in that: The connection assembly comprises a plurality of spline grooves (6) formed on the side wall of the push rod (501), each of the spline grooves (6) being slidably connected to a spline block, and one end of each of the spline blocks being connected to the inner wall of the counterweight ring (502).

5. The air tightness detection device of the oil and gas recovery detector according to claim 3 is characterized in that: The extrusion assembly comprises a threaded hole (701) formed on the other end of the push rod (501), a connecting rod (702) being threadedly connected to the threaded hole (701), an end of the connecting rod (702) away from the push rod (501) being fixedly connected to an extrusion plate (703), and a side of the extrusion plate (703) close to the counterweight ring (502) being connected to an extrusion ball (704) via a plurality of tightening assemblies.

6. The air tightness detection device of the oil and gas recovery detector according to claim 5 is characterized in that: The clamping assembly comprises a clamping tube (801) fixedly connected to a side of the extrusion plate (703) close to the counterweight ring (502); a clamping rod (802) is slidably connected to the clamping tube (801); one end of the clamping rod (802) is connected to the extrusion ball (704); one end of the clamping rod (802) located inside the clamping tube (801) is fixedly connected to the clamping plate (803); the other side of the clamping plate (803) is fixedly connected to a spring (804); the other end of the spring (804) is connected to the bottom wall of the clamping tube (801).

7. The air tightness detection device of the oil and gas recovery detector according to claim 1 is characterized in that: The cylinder (103) is provided with a driving mechanism for driving the piston (104), and the driving mechanism comprises two driving tubes (901) symmetrically arranged and slidably connected in the cylinder (103), one end of the two driving tubes (901) is connected to the piston (104), one of the two driving tubes (901) is slidably connected with a driving rod (902), one end of the driving rod (902) is connected to the inner wall of the cylinder (103), and the other of the two driving tubes (901) is threadedly connected with a threaded rod (903).

8. The air tightness detection device of the oil and gas recovery detector according to claim 7 is characterized in that: A motor (904) is provided at one end of the cylinder (103) away from the main pipeline (102), and an output end of the motor (904) is connected to the threaded rod (903).

Images