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CN-224231542-U - Slip table formula coalbed methane content measuring device

CN224231542UCN 224231542 UCN224231542 UCN 224231542UCN-224231542-U

Abstract

The utility model discloses a sliding table type coalbed methane content measuring device which comprises a frame body, a screw guide rail assembly vertically fixed in the frame body, a screw and a sliding clamp, wherein the screw guide rail assembly is provided with a screw, the sliding clamp is in threaded connection with the screw, an absolute encoder capable of measuring the rotation number of the screw, a quantitative cylinder communicated with a coalbed methane sample tank, a movable cylinder communicated with the atmosphere, the movable cylinder is fixedly connected with the sliding clamp, the bottom of the movable cylinder is communicated with the bottom of the quantitative cylinder through a first connecting pipe, a differential pressure sensor used for measuring the differential pressure of gas and the atmosphere in the quantitative cylinder, and a controller is electrically connected with the screw guide rail assembly, the absolute encoder and the differential pressure sensor and used for controlling the rotation working condition of the screw according to the differential pressure measured by the differential pressure sensor and calculating the volume of a coalbed methane sample in the quantitative cylinder under the atmosphere according to the rotation number of turns of the screw measured by the absolute encoder. The device can realize the automatic measurement of the volume of the measured coalbed methane sample under the atmospheric pressure, and has high accuracy.

Inventors

  • LI JINXING
  • WANG JIAXIANG
  • WU XIANGYU
  • WANG JIAXIN
  • ZHU JIYUE
  • ZHAO LIANG

Assignees

  • 陕西理工大学

Dates

Publication Date
20260512
Application Date
20250430

Claims (10)

  1. 1. Slip table formula coalbed methane content measuring device, characterized by, include: a frame body (10); The screw guide rail assembly (20) is vertically fixed in the frame body (10), the screw guide rail assembly (20) is provided with a screw (21) and a sliding clamp (22) capable of moving up and down along the screw (21), and the sliding clamp (22) is in threaded connection with the screw (21); An absolute encoder (30) capable of measuring the rotation number of the screw rod (21), wherein the absolute encoder (30) is fixedly connected with one end of the screw rod (21); the quantitative barrel (40) is used for being communicated with the coalbed methane sample tank, and the quantitative barrel (40) is vertically and fixedly assembled in the frame body (10); The momentum cylinder (50) is communicated with the atmosphere, the momentum cylinder (50) is vertically fixed inside the frame body (10), the momentum cylinder (50) is fixedly connected with the sliding clamp (22), and the bottom of the momentum cylinder (50) is communicated with the bottom of the quantification cylinder (40) through the first connecting pipe (70); A differential pressure sensor (60) for measuring the differential pressure between the gas inside the metering cylinder (40) and the atmosphere; The controller is electrically connected with the screw guide rail assembly (20), the absolute encoder (30) and the differential pressure sensor (60) and is used for controlling the rotation working condition of the screw (21) according to the differential pressure measured by the differential pressure sensor (60) and calculating the volume of the coalbed methane sample in the measuring cylinder (40) under the atmospheric pressure according to the rotation circle number of the screw (21) measured by the absolute encoder (30).
  2. 2. The slipway type coalbed methane content measurement device according to claim 1, characterized in that the screw guide rail assembly (20) is further provided with a stepper motor (23) and a slipway (24), the slipway (24) is vertically fixed inside the frame body (10), the screw (21) is vertically inserted into the slipway (24), one end of the screw (21) extending out from the top of the slipway (24) is connected with an output shaft of the stepper motor (23), and the sliding clamp (22) is connected with the slipway (24) in a sliding way; The absolute encoder (30) is fixedly connected with one end of the screw rod (21) extending out of the bottom of the sliding table (24), and the controller is electrically connected with the stepping motor (23).
  3. 3. The slipway type coalbed methane content measuring device according to claim 1, wherein a first mounting plate (11) and a second mounting plate (12) are horizontally arranged inside the frame body (10), the first mounting plate (11) and the second mounting plate (12) are provided with assembly holes, and two ends of the quantifying cylinder (40) are fixedly assembled in the assembly holes of the first mounting plate (11) and the second mounting plate (12) respectively.
  4. 4. A slipway coalbed methane content measuring apparatus as claimed in claim 3, characterized in that the distance between the top of the slipway (24) and the first mounting plate (11) in the vertical direction is equal to the distance from the slide clamp (22) to the bottom of the momentum cylinder (50).
  5. 5. The slipway type coalbed methane content measuring device according to claim 4, characterized in that the top of the first mounting plate (11) is fixedly provided with a second connecting pipe (71), a converging valve seat (80), an exhaust electromagnetic valve (81) and an air inlet electromagnetic valve (82) for connecting with a coalbed methane sample tank; The outlet end of the air inlet electromagnetic valve (82), the inlet end of the air outlet electromagnetic valve (81) and one end of the second connecting pipe (71) are communicated with the converging valve seat (80), and the other end of the second connecting pipe (71) is communicated with the quantifying cylinder (40); The air inlet electromagnetic valve (82) and the air outlet electromagnetic valve (81) are electrically connected with the controller.
  6. 6. The slipway coalbed methane content measurement device of claim 5, wherein the high pressure end of the differential pressure sensor is connected to the manifold valve seat (80) and the low pressure end is in the atmosphere.
  7. 7. The slipway type coalbed methane content measurement device according to claim 6, further comprising a water spray prevention assembly (90) and a ventilation pipe (83), wherein the water spray prevention assembly (90) is fixedly connected to the top of the movable measuring cylinder (50); The water spraying prevention assembly (90) is provided with a base (91), a cylindrical shell (92) and an umbrella-shaped flow blocking body (93), the shell (92) is sleeved at the top of the base (91), and the flow blocking body (93) is arranged in the shell (92) and fixedly connected with the base (91); the base (91) is vertically provided with a plurality of first through holes (914) in a penetrating way; The flow blocking body (93) is provided with a supporting rod (931) and a circular concave baffle (932), the supporting rod (931) is vertically and fixedly connected to the base (91), the center of the circular concave baffle (932) is fixedly connected with one end, far away from the base (91), of the supporting rod (931), and the opening of the circular concave baffle (932) faces downwards.
  8. 8. The slipway type coalbed methane content measuring device according to claim 7, wherein the base (91) comprises a main body (911) and a first connecting part (912) and a second connecting part (913) fixedly connected to the upper side and the lower side of the main body (911), the bottom of the shell (92) is sleeved on the first connecting part (912), and the top of the momentum cylinder (50) is sleeved on the second connecting part (913).
  9. 9. The slipway type coalbed methane content measurement device according to claim 8, wherein a second through hole (921) is provided at the top of the housing (92), and the breather pipe (83) is fixedly connected to the second through hole (921).
  10. 10. The slipway coalbed methane content measurement device of claim 9, characterized in that the circular concave baffle (932) has an axial maximum diameter smaller than an axial inner diameter of the housing (92), all first through holes (914) being located in a projection of the circular concave baffle (932) in a vertical direction onto the first connection (912).

Description

Slip table formula coalbed methane content measuring device Technical Field The utility model relates to the technical field of coalbed methane content measurement, in particular to a sliding table type coalbed methane content measurement device. Background Coalbed methane is an unconventional natural gas which is endowed in a coal bed, and the main component of the coalbed methane is hydrocarbon gas generated by decomposing organic matters in the coalification process, and the enrichment of the coalbed methane is closely related to geological conditions such as coal rank, burial depth, permeability, temperature, pressure and the like. Coalbed methane is compacted under high pressure and has higher pressure. The development of the coalbed methane needs to break through the engineering bottleneck of the low-permeability coalbed, and the content measurement data of the coalbed methane is critical to well pattern deployment, yield increase measures and productivity prediction. The utility model provides a simple and easy coalbed methane content measuring apparatu based on balanced method, the device includes the fixed graduated flask that communicates with the coalbed methane sample of being surveyed and the atmospheric graduated flask that communicates through the breather pipe with the atmosphere, and fixed graduated flask and atmospheric graduated flask pass through the connecting pipe intercommunication, and fixed graduated flask top is zero scale mark, and under the initial state, fixed graduated flask inside is filled with full water, and the liquid level is high with fixed graduated flask zero scale mark i.e. highest water level parallel and level in the atmospheric graduated flask. When the measured coalbed methane enters the fixed measuring cylinder, the air pressure of the fixed measuring cylinder is increased due to the fact that the entering coalbed methane increases the water level of the atmospheric measuring cylinder, then the atmospheric measuring cylinder is manually moved downwards until the liquid level heights in the two measuring cylinders are the same and are not changed, finally the air pressure in the fixed measuring cylinder is equal to the atmospheric pressure, then the scale value on the fixed measuring cylinder is read to obtain the volume of the measured coalbed methane sample under the atmospheric pressure, and the theoretical reserve of the coalbed methane in the regional coalbed methane block can be calculated by combining parameters such as the thickness, the distribution and the like of the coalbed methane. However, this kind of adoption manual work removes the atmosphere graduated flask, and the mode degree of automation of reading the scale on the fixed graduated flask is low, and the requirement on operating personnel is higher, and the error appears easily. Disclosure of utility model Based on the above, it is necessary to provide a slipway type coalbed methane content measuring device, which can realize automatic measurement of the volume of a coalbed methane sample under the atmospheric pressure and has high accuracy. The utility model provides a slipway type coalbed methane content measuring device, which comprises: A frame body; the screw guide rail assembly is vertically fixed in the frame body and is provided with a screw and a sliding clamp capable of moving up and down along the screw, and the sliding clamp is in threaded connection with the screw; the absolute encoder can measure the rotation number of the screw rod and is fixedly connected with one end of the screw rod; the quantitative barrel is used for being communicated with the coalbed methane sample tank and is vertically and fixedly assembled in the frame body; a movable measuring cylinder communicated with the atmosphere, the movable measuring cylinder is vertically fixed in the frame body, the movable measuring cylinder is fixedly connected with the sliding clamp, the bottom of the dynamic measuring cylinder is communicated with the bottom of the quantitative measuring cylinder through a first connecting pipe; The differential pressure sensor is used for measuring the differential pressure between the gas in the quantitative cylinder and the atmosphere; And the controller is electrically connected with the lead screw guide rail assembly, the absolute encoder and the differential pressure sensor and is used for controlling the rotation working condition of the lead screw according to the differential pressure measured by the differential pressure sensor and calculating the volume of the coalbed methane sample in the measuring cylinder under the atmospheric pressure according to the rotation turns of the lead screw measured by the absolute encoder. In one embodiment, the screw guide rail assembly is further provided with a stepping motor and a sliding table, the sliding table is vertically fixed in the frame body, the screw is vertically inserted into the sliding table in a penetrating way, one end of the