CN217901083U

CN217901083U - Pressure sensor

Info

Publication number: CN217901083U
Application number: CN202221970564.4U
Authority: CN
Inventors: 党美芝
Original assignee: Shenyang Xinyulin Petroleum Machinery Co ltd
Current assignee: Shenyang Xinyulin Petroleum Machinery Co ltd
Priority date: 2022-07-28
Filing date: 2022-07-28
Publication date: 2022-11-25
Anticipated expiration: 2032-07-28

Abstract

The utility model discloses a pressure sensor, including the union, the top joint of union is fixed with the sensor main part, and the pressure input port has been seted up to the bottom of sensor main part, and the inner chamber of sensor main part is equipped with piston and plunger, and the top fixed mounting of end cover has quick-operation joint, is equipped with seal assembly in the sensor main part, and the observation hole has been seted up to the lateral wall middle part left and right symmetry of sensor main part. Adopt hydraulic pressure transmission signal's mode, no longer use traditional gas-liquid signal transmission, the transmission effect of reinforcing signal guarantees pressure monitoring's accuracy, simultaneously, has seted up the observation hole at the lateral wall of sensor main part, monitors its inside seal assembly's operating condition through observation Kong Fangbian that sets up, damages the back when inside seal assembly, in time dismantles, changes, and the dismantlement process is simple, convenient, guarantees the utility model discloses stability and accuracy to pressure monitoring in the use.

Description

Pressure sensor

Technical Field

The utility model relates to a petroleum machinery pressure monitoring technical field, concretely relates to pressure sensor.

Background

The pressure of the drilling fluid under the well needs to be monitored in the process of petroleum drilling, so that the construction safety is ensured. What tradition adopted pressure monitoring's sensor is the pressure transmission mode of gas-liquid conversion, transmit pressure through the gas-liquid conversion can lead to the precision of transmission not high, the signal shortcoming such as unstable of transmission, and traditional sensor can't carry out timely monitoring to its inside seal assembly's operating condition at the in-process that uses moreover, takes place to damage the back when inside seal assembly, can't in time change its inside seal assembly. Resulting in affecting the stability and accuracy of subsequent pressure monitoring. To this end, we propose a pressure sensor.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a pressure sensor to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a pressure sensor, includes the union, the top joint of union is fixed with the sensor main part, the pressure input port has been seted up to the bottom of sensor main part, the inner chamber of sensor main part is equipped with piston and plunger, the top of sensor main part is equipped with the end cover through the hexagon socket head cap screw is fixed, the top fixed mounting of end cover has quick-operation joint, the interior seal assembly that is equipped with of sensor main part, the observation hole has been seted up to the lateral wall middle part left and right symmetry of sensor main part.

Preferably, seal assembly includes first O type sealing washer, retaining ring, circlip, second O type sealing washer and third O type sealing washer, first O type sealing washer and retaining ring are installed at the bottom lateral wall of plunger from last embedding down, circlip fixed mounting is in the pressure input mouth, the lateral wall at the piston is installed in the embedding of second O type sealing washer, the lateral wall at the end cover is installed in the embedding of third O type sealing washer.

Preferably, the diameter of the plunger matches the diameter of the pressure input port, and the length of the plunger is smaller than the length of the pressure input port.

Preferably, an evacuation valve is fixedly mounted at the top of the end cover.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model provides a pressure sensor, a pressure to the drilling fluid is monitored in being used for oil drilling, hydraulic fluid in the measured medium of pressure monitoring is not the sensor contacts, adopt the mode of hydraulic pressure transmission signal, no longer use traditional gas-liquid signal transmission, the transmission effect of reinforcing signal, guarantee pressure monitoring's accuracy, and simultaneously, the observation hole has been seted up at the lateral wall of sensor main part, observe Kong Fangbian through setting up and monitor its inside seal assembly's operating condition, after inside seal assembly damages, in time dismantle, change, the dismantlement process is simple, and is convenient, guarantee the utility model discloses stability and accuracy to pressure monitoring in the use.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a detailed view of fig. 1 at a.

In the figure: 1. union, 2, connector, 3, sensor main part, 4, socket head cap screw, 5, end cover, 6, pressure input port, 7, piston, 8, plunger, 9, seal assembly, 91, first O type circle, 92, retaining ring, 93, circlip, 94, second O type sealing washer, 95, third O type sealing washer, 10, observation hole, 11, blowoff valve, 12, quick-operation joint.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

Referring to fig. 1 and fig. 2, the present invention provides a technical solution: a pressure sensor comprises a union 1, wherein a connecting port 2 for pressure input is formed in the bottom of the union 1, the connecting port 2 is used for being communicated with drilling fluid to measure the pressure of the drilling fluid in a drilling process, a sensor main body 3 is fixedly connected to the top of the union 1 in a clamping mode, an end cover 5 is fixedly assembled on the top of the sensor main body 3 through an inner hexagon screw 4, a pressure input port 6 is formed in the bottom of the sensor main body 3, and pressure is applied to the inside of the sensor main body 3 after the pressure input port passes through the connecting port and the pressure input port 6;

the inner cavity of the sensor main body 3 is provided with a piston 7, the bottom of the piston 7 is fixedly connected with a plunger 8 through an inner bolt, the plunger 8 is inserted into the pressure input port 6, the outer side wall of the bottom of the plunger 8 is sleeved with a first O-shaped sealing ring 91 and a check ring 92, an elastic check ring 93 is clamped and fixed in the side wall of the inner cavity of the pressure input port 6, a second O-shaped sealing ring 94 is embedded and installed on the side wall of the piston 7, a third O-shaped sealing ring 95 is embedded and installed on the side wall of the end cover 5, and the air tightness between the whole sensor and internal parts is ensured through a sealing assembly 9 consisting of the first O-shaped sealing ring 91, the check ring 92, the elastic check ring 93, the second O-shaped sealing ring 94 and the third O-shaped sealing ring 95;

the middle of the side wall of the sensor main body 3 is provided with two observation holes 10 communicated with the inner cavity of the sensor main body 3, the observation holes 10 are symmetrically distributed left and right, in the using process of the sensor main body 3, if drilling fluid seeps out from the observation holes 10, it is indicated that a first O-shaped sealing ring 91 and a check ring 92 on the outer side wall of a plunger 8 in the sensor main body 3 are damaged and fail, if hydraulic oil seeps out from the observation holes 10, it is indicated that a second O-shaped sealing ring 94 embedded and installed on the side wall of a piston 7 is damaged and fails, no matter which condition occurs, a valve corresponding to a pressure taking point and a corresponding valve for pressure measurement need to be immediately closed, the sensor main body 3 is disassembled, the corresponding sealing element is replaced and then used continuously, and the stability and the accuracy of pressure monitoring are ensured;

an exhaust valve 11 and a quick joint 12 are fixedly mounted at the top of the end cover 5, the exhaust valve 11 is used for judging whether air inside the sensor main body 3 is exhausted, the quick joint 12 is communicated with an inner cavity of the sensor main body 3, the quick joint 12 is used for being connected with an external pressure gauge, and pressure inside the sensor main body 3 is tested and read through the pressure gauge.

The sensor completely adopts a hydraulic mode in the pressure transmission process, the traditional gas-liquid conversion transmission process of the pneumatic pressure transmitter is not used, and the problem of low transmission precision caused by gas-liquid conversion is solved.

The working principle is as follows: during the use process, firstly, assembling all parts of the sensor, then connecting the union 1 with a measured pipeline, connecting the inner cavity of the sensor main body 3 with an external pressure gauge and an oil supply end through a quick joint 12, loosening a valve cap of an exhaust valve 11 before use, filling oil into the inner cavity of the sensor main body 3 by using the external oil supply end, ejecting air in the inner cavity of the sensor main body 3 from the exhaust valve 11 by hydraulic oil, discharging the air in the sensor main body 3 completely after the oil seeps out from an oil outlet of the exhaust valve 11, locking the valve cap of the exhaust valve 11, continuously pressurizing to enable the piston 7 and the plunger 8 to be positioned at the bottommost part of the stroke shown in figure 1, then stopping supplying the oil into the sensor main body 3, initializing the pressure gauge at the moment, and subsequently opening a switch valve of the measured pipeline, the method comprises the steps that liquid to be tested enters from a pressure input port 6, the liquid to be tested extrudes hydraulic oil above the plunger 8 and the piston 7 after pressure is caused on the plunger, pressure in a tested pipeline is tested through a pressure gauge, the sensor main body 3 is observed through an observation hole 10 in the using process, if drilling fluid seeps out from the observation hole 10, it is indicated that a first O-shaped sealing ring 91 and a check ring 92 on the outer side wall of the plunger 8 in the sensor main body 3 are damaged and failed, if hydraulic oil seeps out from the observation hole 10, it is indicated that a second O-shaped sealing ring 94 embedded and installed on the side wall of the piston 7 is damaged and failed, a valve in a pressure taking pipeline and a corresponding valve for pressure measurement are closed, the sensor main body 3 is timely disassembled and maintained, a damaged sealing element in the sensor main body is replaced, and stability and accuracy of follow-up pressure monitoring are guaranteed.

Claims

1. A pressure sensor, characterized by: including union (1), the top joint of union (1) is fixed with sensor body (3), pressure input port (6) have been seted up to the bottom of sensor body (3), the inner chamber of sensor body (3) is equipped with piston (7) and plunger (8), the top of sensor body (3) is fixed through interior hexagonal screw (4) and is equipped with end cover (5), the top fixed mounting of end cover (5) has quick-operation joint (12), be equipped with seal assembly (9) in sensor body (3), observation hole (10) have been seted up to the lateral wall middle part left and right symmetry of sensor body (3).

2. A pressure sensor as claimed in claim 1, wherein: seal assembly (9) include first O type sealing washer (91), retaining ring (92), circlip (93), second O type sealing washer (94) and third O type sealing washer (95), first O type sealing washer (91) and retaining ring (92) are installed at the bottom lateral wall of plunger (8) from last embedding down, circlip (93) fixed Assembly is in pressure input port (6), the lateral wall at piston (7) is installed in second O type sealing washer (94) embedding, the lateral wall at end cover (5) is installed in third O type sealing washer (95) embedding.

3. A pressure sensor as claimed in claim 1, wherein: the diameter of the plunger (8) is matched with that of the pressure input port (6), and the length of the plunger (8) is smaller than that of the pressure input port (6).

4. A pressure sensor as claimed in claim 1, wherein: and an exhaust valve (11) is fixedly arranged at the top of the end cover (5).