Safety valve integrated with displacement sensor

Abstract

The utility model discloses a safety valve integrated with a displacement sensor. The safety valve comprises a safety valve body and the displacement sensor integrated behind the safety valve body. The safety valve body comprises a hollow safety valve shell and a valve element which is arranged in a hollow inner cavity of the safety valve shell and can move front and back. The displacement sensor comprises an iron core, an induction coil, a hollow sensor shell and a chip, wherein the induction coil surrounds the periphery of the iron core and is separated from an iron core gap to enable the iron core to generate electromotive force when the iron core acts, the chip is arranged in a hollow cavity of the sensor shell and is electrically connected with the induction coil, and a sensor probe is arranged at the front end of the iron core to measure the displacement of the valve element. According to the utility model, the displacement data of the valve core of the safety valve can be read and recorded.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic control equipment, in particular to a safety valve integrated with a displacement sensor. Background Art

[0002] In the lower cavity of the hydraulic support column for coal mines (a term in the coal industry, actually a large hydraulic cylinder, and the lower cavity refers to the rodless cavity), a pressure-holding system is composed of a safety valve, a hydraulic control one-way valve, and a pressure sensor is responsible for monitoring the pressure change of the system. When the column is subjected to an external load, the pressure in the lower cavity of the column will increase. When the pressure rises to the threshold value of the safety valve, the safety valve will open. If continuous loading is applied at this time, the pressure in the lower cavity of the column will be maintained at the threshold value of the safety valve, and the safety valve plays a role in keeping the lower cavity of the column with constant resistance at this time. Thus, the importance of the safety valve can be seen.

[0003] However, in the prior art, the safety valves in the industry cannot accurately monitor the moving distance of the valve core and cannot control the moving time of the valve core. More often, it only needs to be set to open and move to play the role of keeping the lower cavity of the column with constant resistance, and the pressure-holding time of its valve core is completed by a spring. And our company needs to accurately monitor the moving distance and time of the valve core of the safety valve in order to achieve precise control of the pressure-holding system. Summary of the Invention

[0004] The purpose of the utility model is to provide a safety valve integrated with a displacement sensor to solve the problem that the safety valve in the prior art cannot accurately monitor the moving distance and time of the valve core.

[0005] In order to achieve the above purpose, the technical solution of the utility model is as follows:

[0006] A safety valve integrated with a displacement sensor includes a safety valve main body and a displacement sensor integrated behind the safety valve main body;

[0007] The safety valve main body includes a hollow safety valve housing and a valve core that can move back and forth in the hollow inner cavity of the safety body;

[0008] The displacement sensor includes an iron core, an induction coil wound around the circumference of the iron core and spaced from the iron core at intervals to generate an electromotive force when the iron core moves, a hollow sensor housing, and a chip disposed in the hollow cavity of the sensor housing and electrically connected to the induction coil. A sensor probe is provided at the front end of the iron core to measure the displacement of the valve core.

[0009] As an improvement to the above technical solution, the hollow cavity of the safety valve housing is a stepped hole, one end of which is a shaft hole with a small diameter, and the other end is a spring seat mounting hole with a large diameter; a spring seat is provided at the front end of the spring seat mounting hole, and a pressure regulating plug is installed at the rear end so that the safety valve spring is installed between the spring seat and the pressure regulating plug to adjust the elastic force of the safety valve spring on the spring seat, and the valve core penetrates through the shaft hole and the rear end is in contact with the spring seat.

[0010] As an improvement to the above technical solution, a joint is provided at the front end of the valve core, and a rubber sleeve is sleeved on the outer periphery of the front end of the safety valve housing.

[0011] As an improvement to the above technical solution, a rivet is riveted between the pressure regulating plug and the safety valve housing.

[0012] As an improvement to the above technical solution, a front cover with an opening and a measuring head housing installed at the front end of the front cover are installed at the front end of the sensor housing; a rear plug is provided at the rear end of the measuring head housing, and a front plug with an opening is provided at the front end; a pull rod is disposed through the front plug, the sensor probe is disposed at the front end of the pull rod, and the iron core is disposed at the rear end of the pull rod; an internal spring is disposed around the iron core, and the induction coil is wound around the internal spring and spaced apart from the internal spring; the chip is disposed at the rear end of the sensor housing and is electrically connected to the induction coil.

[0013] As an improvement to the above technical solution, a cover plate is installed at the rear end of the sensor housing.

[0014] As an improvement to the above technical solution, the periphery of the sensor housing is opened to embed a Hirschmann joint.

[0015] As an improvement to the above technical solution, the induction coil includes a primary coil and two secondary coils.

[0016] As an improvement to the above technical solution, a copper sleeve is disposed in the inner cavity of the front plug to form a sliding fit with the pull rod.

[0017] Compared with the prior art, the advantages and positive effects of the present invention are:

[0018] The safety valve with an integrated displacement sensor of the present invention integrates a displacement sensor behind the safety valve, adopts the LVDT principle to collect the valve core displacement data of the safety valve, can read and record the displacement data of the valve core of the safety valve, detect the working state of the safety valve by calculating the displacement data and pressure data, and finally transmit the working state information, displacement data information and time information of the safety valve to the outside through the Hirschmann joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention, and those of ordinary skill in the art can also obtain other drawings without creative efforts based on these drawings.

[0020] Figure 1It is a schematic diagram of the overall structure of the present utility model;

[0021] Figure 2 It is a schematic diagram of the structure of the displacement sensor with an internal spring of the present utility model. Specific embodiments

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0023] As Figure 1 - Figure 2 shown, the safety valve with an integrated displacement sensor of the present utility model includes a safety valve body and a displacement sensor integrated behind the safety valve body;

[0024] The safety valve body includes a hollow safety valve housing 11 and a valve core 12 that can move back and forth in the hollow inner cavity of the safety body 11;

[0025] The displacement sensor includes an iron core 14, an induction coil 15 that surrounds the circumference of the iron core 14 and is spaced apart from the iron core 14 by a gap so as to generate an electromotive force when the iron core 14 moves, a hollow sensor housing 13, and a chip 16 disposed in the hollow cavity of the sensor housing 13 and electrically connected to the induction coil 15. A sensor probe 17 is provided at the front end of the iron core 14 to measure the displacement of the valve core 12.

[0026] The hollow cavity of the safety valve housing 11 is a stepped hole, one end of which is a shaft hole with a small diameter, and the other end is a spring seat mounting hole with a large diameter; a spring seat 18 is provided at the front end of the spring seat mounting hole, and a pressure regulating plug 19 is installed at the rear end so that the safety valve spring 20 is installed between the spring seat 18 and the pressure regulating plug 19 to adjust the elastic force of the safety valve spring 20 on the spring seat 18. The valve core 12 passes through the shaft hole and the rear end is in contact with the spring seat 18. A joint 22 is provided at the front end of the valve core 12, and a rubber sleeve 21 is sleeved on the outer periphery of the front end of the safety valve housing 11. A rivet 23 is riveted between the pressure regulating plug 19 and the safety valve housing 11.

[0027] A front cover 24 with an opening is installed at the front end of the sensor housing 13, and a measuring head housing 25 is installed at the front end of the front cover 24; a rear plug 26 is arranged at the rear end of the measuring head housing 25, and a front plug 27 with an opening is arranged at the front end; a pull rod 28 is arranged through the front plug 27, the sensor probe 17 is arranged at the front end of the pull rod 28, and the iron core 14 is arranged at the rear end of the pull rod 28; an internal spring 29 is arranged around the circumference of the iron core 14, and the induction coil 15 is wound around the circumference of the internal spring 29 and is spaced apart from the internal spring 29 with a gap; the chip 16 is arranged at the rear end of the sensor housing 13 and is electrically connected to the induction coil 15. A cover plate 30 is installed at the rear end of the sensor housing 11. The circumference of the sensor housing 11 is open to embed a Hirschmann connector 31. The induction coil 15 includes a primary coil and two secondary coils.

[0028] A copper sleeve 32 is arranged in the inner cavity of the front plug 27 to form a sliding fit with the pull rod 28.

[0029] The safety valve of the integrated displacement sensor of the present invention integrates a displacement sensor behind the safety valve. The LVDT principle is adopted to collect the spool displacement data of the safety valve, and the spool displacement data of the safety valve can be read and recorded. By calculating the displacement data and pressure data, the working state of the safety valve is detected. Finally, the working state information, displacement data information and time information of the safety valve are transmitted outward through the Hirschmann connector.

[0030] Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts, any modifications, equivalent replacements, improvements, etc., shall be included in the protection scope of the present invention.

Claims

1. A safety valve integrated with a displacement sensor, characterized in that: It includes a safety valve body and a displacement sensor integrated behind the safety valve body; The safety valve body includes a hollow safety valve housing and a valve core that can move back and forth in the hollow inner cavity of the safety valve body; The displacement sensor includes an iron core, an induction coil that surrounds the periphery of the iron core and is spaced apart from the iron core by a gap to generate an electromotive force when the iron core moves, a hollow sensor housing, and a chip disposed in the hollow cavity of the sensor housing and electrically connected to the induction coil. A sensor probe is provided at the front end of the iron core to measure the displacement of the valve core.

2. The safety valve with an integrated displacement sensor according to claim 1, characterized in that: The hollow cavity of the safety valve housing is a stepped hole, one end of which is a small-diameter shaft hole and the other end is a large-diameter spring seat mounting hole; a spring seat is provided at the front end of the spring seat mounting hole, and a pressure regulating plug is installed at the rear end so that the safety valve spring is installed between the spring seat and the pressure regulating plug to adjust the elastic force of the safety valve spring on the spring seat. The valve core passes through the shaft hole and its rear end is in contact with the spring seat.

3. The safety valve with an integrated displacement sensor according to claim 2, characterized in that: A joint is provided at the front end of the valve core, and a rubber sleeve is sleeved on the outer periphery of the front end of the safety valve housing.

4. The safety valve integrated with a displacement sensor according to claim 2, wherein: A rivet is riveted between the pressure regulating plug and the safety valve housing.

5. The safety valve with an integrated displacement sensor according to claim 1, characterized in that: The front end of the sensor housing is installed with a front cover with an opening and a measuring head housing installed at the front end of the front cover; a rear plug is provided at the rear end of the measuring head housing, and a front plug with an opening is provided at the front end; a pull rod is disposed through the front plug, the sensor probe is disposed at the front end of the pull rod, and the iron core is disposed at the rear end of the pull rod; a built-in spring is provided on the periphery of the iron core, and the induction coil surrounds the periphery of the built-in spring and is spaced apart from the built-in spring by a gap; the chip is disposed at the rear end of the sensor housing and is electrically connected to the induction coil.

6. The safety valve integrated with a displacement sensor according to claim 5, characterized in that: A cover plate is installed at the rear end of the sensor housing.

7. The safety valve with an integrated displacement sensor according to claim 5, characterized in that: The periphery of the sensor housing is open to embed a Hirschmann connector.

8. The safety valve integrated with a displacement sensor according to claim 5, characterized in that: The induction coil includes a primary coil and two secondary coils.

9. The safety valve integrated with a displacement sensor according to claim 5, characterized in that: A copper sleeve is provided in the inner cavity of the front plug to form a sliding fit with the pull rod.

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