A fiber optic detection switch specifically for volume tubes

Abstract

The present invention relates to a fiber optic detection switch dedicated to a volume tube, comprising a base, fixed on the metering tube section of the volume tube, wherein a cavity is provided in the base; a probe seat, installed above the base, wherein a cavity is provided in the probe seat; a fiber optic switch, installed on the probe seat via the fiber optic switch seat; a resettable trigger mechanism, provided in the cavity in the base; a resettable fiber optic shielding mechanism, provided in the cavity in the probe seat, and connected to the resettable trigger mechanism in a transmission manner. After the fiber optic probe at one end of the fiber optic switch is shielded by the resettable fiber optic shielding mechanism, a photoelectric signal is sent to the control system for feedback, thereby realizing remote automated signal metering control. Compared with the prior art, the present invention effectively realizes remote control, and the present invention highlights unique design ideas, simple structure, low manufacturing cost, easy control, photoelectric signal, and high sensitivity.

Description

Technical Field

[0001] The invention relates to a detection switch, in particular to an optical fiber detection switch dedicated to a volume tube. Background Art

[0002] As oil resources become increasingly scarce, the measurement of oil products is becoming increasingly important in various links such as oil extraction, transportation, and refining. Strict requirements should be imposed on the measurement accuracy and performance of flow meters to be regularly calibrated. The measurement accuracy of flow meters used for trade transfer should not be lower than 0.2%. In order to ensure the accuracy and reliability of flow measurement, a high-precision volume tube flow calibration device is required.

[0003] A volume tube flow calibration device is a standard device used for online flow meter verification. By connecting the volume tube in series downstream of the flow meter being tested, the liquid flowing out of the flow meter passes through the volume tube, verifying or calibrating the flow meter. The volume tube flow standard device is used to calibrate the metering characteristics of positive displacement or velocity flow meters that output pulse signals. Once verified or calibrated with this device, the flow meter is guaranteed to operate properly within a specified time and accuracy range, allowing reliable application in metering processes.

[0004] Patent CN211954358U discloses a volume tube detection switch circuit, including a flow meter, an electronic counter, an operating pipe section, a power supply circuit, a photoelectric sensor circuit, a voltage comparator circuit, and an audible and visual alarm circuit; a volume section is provided in the operating pipe section, a first detection switch is provided at the outer wall of one end of the volume section, and a second detection switch is provided at the outer wall of the other end of the volume section; a displacer is provided in the volume section, and sealing tapes are provided at both ends of the displacer, and the displacer is connected to the inner wall of the volume section via the sealing tape. However, it is a circuit for a volume tube detection switch and does not involve the specific structure of the detection switch. At present, there is no detection switch for volume tube testing in the prior art. Summary of the Invention

[0005] The purpose of the present invention is to solve the above problems and provide a fiber optic detection switch for volume tubes with simple structure, low manufacturing cost, easy control, photoelectric signal and high sensitivity.

[0006] The purpose of the present invention is achieved through the following technical solutions:

[0007] A fiber optic detection switch for a volume tube, comprising:

[0008] A base is fixed on the metering tube section of the volume tube, and a cavity is provided in the base;

[0009] A probe seat is installed above the base, and a cavity is provided in the probe seat;

[0010] An optical fiber switch is mounted on the probe base via an optical fiber switch base;

[0011] a resettable trigger mechanism disposed in a cavity within the base;

[0012] The resettable optical fiber shielding mechanism is arranged in the cavity in the probe seat and is transmission-connected to the resettable trigger mechanism.

[0013] Furthermore, the trigger mechanism includes a push rod, a steel ball, a flow regulating nut and a stroke reset spring, the steel ball is located at the lower end, the lower end of the push rod is tangent to the steel ball, the flow regulating nut is sleeved on the push rod, the stroke reset spring is sleeved on the push rod, the push rod can move up and down, the upper end of the stroke reset spring is in contact with the flow regulating nut, and the lower end is in contact with one end face of the push rod, the stroke reset spring is in a compressed state, and has the function of resetting the steel ball that is pushed upward by the metering ball in the metering tube section.

[0014] Furthermore, the resettable optical fiber blocking mechanism includes a signal transmitting adjustment screw, an adjustment plate, a signal transmitting arm and a signal transmitting shaft. The signal transmitting adjustment screw is fixed on the adjustment plate. The lower end of the signal transmitting adjustment screw is spherical and tangent to the top rod. One end of the signal transmitting shaft is connected and fixed to the adjustment plate, and the other end of the signal transmitting shaft is connected and fixed to the signal transmitting arm. When the signal transmitting arm moves, the optical fiber probe at one end of the optical fiber switch is blocked by the moving signal transmitting arm, and a photoelectric signal is sent back to the control system to realize remote automated signal measurement control.

[0015] Furthermore, the resettable optical fiber shielding mechanism also includes a reset spring, the inner ring of which is sleeved on the outer end of the signal transmitting shaft, one end of the reset spring is connected to the adjustment plate, and the other end is connected to the probe seat, which has the function of resetting the signal transmitting arm.

[0016] Furthermore, one end of the signal transmitting shaft is connected and fixed to the adjustment plate by using a hexagon socket head screw.

[0017] Furthermore, the other end of the signal transmitting shaft is connected and fixed to the signal transmitting arm by using a hexagon socket head screw.

[0018] Furthermore, the adjustment plate is installed concentrically with the signal transmitting axis.

[0019] Furthermore, the base is a square base.

[0020] Furthermore, an O-ring is sealed between the base and the probe seat.

[0021] Furthermore, an upper cover is provided on the upper portion of the probe seat.

[0022] The specific working principle of the detection switch of the present invention is:

[0023] When in use, the fiber optic detection switch is installed on the metering pipe section of the volume tube. The steel ball in the valve seat is triggered by the metering ball on the inner wall of the pipe to move upward. The steel ball lifts the push rod and moves upward synchronously. The adjustment plate, signal adjustment screw, and signal arm swing upward synchronously through the signal axis. The signal arm blocks the fiber optic switch, sends out a photoelectric signal, and feeds back to the metering control system to realize remote automated signal metering control.

[0024] Compared with the prior art, the present invention has the following advantages:

[0025] The present invention sets a resettable trigger mechanism and a resettable optical fiber shielding mechanism in the base and the probe seat. The metering ball moving in the volume tube will touch the steel ball of the resettable trigger mechanism, thereby triggering a series of actions, namely, the steel ball lifts the push rod, the push rod lifts the signal adjustment screw, and the signal adjustment screw drives the adjustment plate and the signal arm to swing upward synchronously through the signal axis, so that the signal arm moves upward, shielding the optical fiber switch probe, and sending a pole signal to feedback to the control system.

[0026] The present invention has a double-rotating arm 1:1 angular rotation contactless signal transmission mode, and an optical fiber detection switch has a double-rotating arm 1:1 angular rotation contactless signal transmission mode; the lower end of the push rod is in point-to-surface contact with the steel ball, and the structural setting of the steel ball and the end point-to-surface contact of the lower end of the push rod can reduce the friction between the steel ball and the lower end of the push rod, and due to the point-to-surface contact, the steel ball can achieve 360° rotation, and the adjustment is more sensitive. The coaxial and concentric setting has high precision and high concentricity; remote control is effectively realized. The present invention highlights unique design ideas, simple structure, low manufacturing cost, easy control, photoelectric signal, and high sensitivity. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic cross-sectional view of the present invention;

[0028] Figure 2 This is a schematic diagram of the external overall structure of the present invention;

[0029] Figure 3 It is a schematic diagram of the explosion structure of the present invention;

[0030] Figure 4 Schematic diagram of the internal structure of the present invention;

[0031] Figure 5 It is a schematic cross-sectional view of the present invention from another angle. DETAILED DESCRIPTION

[0032] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] like Figure 1-5A fiber optic detection switch for volume tubes includes a square detection switch base 4, which is welded and fixed to the metering tube section 1 of the volume tube. The base 4 is docked with the probe base 10 on the upper plane. The connection between the base 4 and the inner cavity of the probe base 10 is sealed with an O-ring 16. The upper part of the probe base 10 is provided with an upper cover 11. The inner cavity of the base 4 is provided with a push rod 3, a steel ball 2, a flow adjustment nut 5 and a stroke reset spring 17. The lower end of the push rod 3 is tangent to the steel ball 2. The steel ball 2 is pushed upward by the equipment in the metering tube section and triggered. The upper end of the push rod 3 passes through the flow adjustment nut 5. The lower end of the signal adjusting screw 6 is spherical and tangent to the push rod 3. The stroke reset spring 17 is installed coaxially with the push rod 3. One end of the reset spring 17 is in contact with the flow adjusting nut 5, and the other end of the stroke reset spring 17 is in contact with one end surface of the push rod 3, making reciprocating motion. The signal adjusting screw 6 is fixed on the adjusting plate 7, and the adjusting plate 7 is installed concentrically with the signal transmitting shaft 15. One end of the signal transmitting shaft 15 is connected and fixed to the adjusting plate 7 with a hexagon socket head screw, and the other end of the signal transmitting shaft 15 is connected and fixed to the signal transmitting arm 13 with a hexagon socket head screw. The signal transmitting shaft 15 is installed on the axial positioning seat 14. The inner ring of the reset spring 12 is sleeved on the outer end of the signal transmitting shaft 15, one end of the reset spring 12 is connected to the adjustment plate 7, and the other end of the reset spring 12 is connected to the probe seat 10, performing a reciprocating reset action, and the signal transmitting arm 13 can move upward. The optical fiber switch 8 is fixed in the optical fiber switch seat 9. After the optical fiber probe at one end of the optical fiber switch 8 is blocked by the upward moving signal transmitting arm 13, a photoelectric signal is sent to feed back to the control system, thereby realizing remote automated signal metering control. After the optical fiber switch probe is blocked by the upward moving signal transmitting arm, a pole signal is sent to feed back to the control system, thereby realizing remote automated signal metering control.

[0034] When in use, the fiber optic detection switch is installed on the metering pipe section of the volume tube. The steel ball in the valve seat is triggered by the metering ball on the inner wall of the pipe to move upward. The steel ball lifts the push rod and moves upward synchronously. The adjustment plate, signal adjustment screw, and signal arm swing upward synchronously through the signal axis. The signal arm blocks the fiber optic switch, sends out a photoelectric signal, and feeds back to the metering control system to realize remote automated signal metering control.

[0035] The lower end of the top rod of the fiber optic detection switch for the volume tube of the present invention is in point-to-surface contact with the steel ball. The structural setting of the steel ball and the end-point surface contact of the lower end of the top rod can reduce the friction between the steel ball and the lower end of the top rod. Due to the point-to-surface contact, the steel ball can achieve 360° rotation, and the adjustment is more sensitive; the coaxial and concentric setting has high precision and high concentricity.

[0036] The above description of the embodiments is intended to facilitate understanding and use of the invention by those skilled in the art. It will be apparent that those skilled in the art can readily make various modifications to these embodiments and apply the general principles described herein to other embodiments without requiring inventive effort. Therefore, the present invention is not limited to the above-described embodiments. Improvements and modifications made by those skilled in the art based on the disclosure of the present invention, without departing from the scope of the present invention, should be within the scope of protection of the present invention.

Claims

1. A fiber optic detection switch for a volume tube, characterized in that: include: A base (4) is fixed on the metering tube section (1) of the volume tube, and a cavity is provided in the base (4); A probe seat (10) is installed above the base (4), and a cavity is provided in the probe seat (10); An optical fiber switch (8) is mounted on the probe base (10) via an optical fiber switch base (9); A resettable trigger mechanism is provided in the cavity of the base (4); the trigger mechanism comprises a push rod (3), a steel ball (2), a flow regulating nut (5) and a stroke reset spring (17). The steel ball (2) is located at the bottom, the lower end of the push rod (3) is tangent to the steel ball (2), and the flow regulating nut (5) is sleeved on the push rod (3). The stroke return spring (17) is sleeved on the push rod (3), the upper end of the stroke return spring (17) is in contact with the flow regulating nut (5), and the lower end is in contact with one end surface of the push rod (3). The stroke return spring (17) is in a compressed state and has the function of returning the steel ball (2) that is pushed upward by the metering ball in the metering pipe section (1); A resettable optical fiber shielding mechanism is provided in the cavity of the probe seat (10) and is in transmission connection with the resettable trigger mechanism; The resettable optical fiber shielding mechanism comprises a signal transmission adjustment screw (6), an adjustment plate (7), a signal transmission arm (13) and a signal transmission shaft (15). The signal adjustment screw (6) is fixed on the adjustment plate (7), and the lower end of the signal adjustment screw (6) is spherical and tangent to the top rod (3). One end of the signal transmitting shaft (15) is connected and fixed to the adjustment plate (7), and the other end of the signal transmitting shaft (15) is connected and fixed to the signal transmitting arm (13); When the signal transmitting arm (13) moves, the optical fiber probe at one end of the optical fiber switch (8) is shielded by the moving signal transmitting arm (13), and a photoelectric signal is sent back to the control system, thereby realizing remote automatic signal measurement control.

2. The fiber optic detection switch for volume tube according to claim 1, characterized in that: The resettable optical fiber shielding mechanism further includes a reset spring (12), the inner ring of which is sleeved on the outer end of the signal transmitting shaft (15), one end of which is connected to the adjustment plate (7), and the other end of which is connected to the probe seat (10), and has the function of resetting the signal transmitting arm (13).

3. The fiber optic detection switch for volume tube according to claim 1, characterized in that: One end of the signal transmission shaft (15) is connected and fixed to the adjustment plate (7) by using a hexagon socket head screw.

4. The fiber optic detection switch for volume tube according to claim 1, characterized in that: The other end of the signal transmission shaft (15) is connected and fixed to the signal transmission arm (13) by using a hexagon socket head screw.

5. The fiber optic detection switch for volume tube according to claim 1, characterized in that: The adjustment plate (7) is installed concentrically with the signal transmitting shaft (15).

6. The fiber optic detection switch for volume tube according to claim 1, characterized in that: The base (4) is a square base.

7. The fiber optic detection switch for volume tube according to claim 1, characterized in that: An O-ring (16) is sealed between the base (4) and the probe seat (10).

8. The fiber optic detection switch for volume tube according to claim 1, characterized in that: An upper cover (11) is provided on the upper portion of the probe seat (10).

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