CN215444407U - Pressure type thermometer for liquid ring vacuum pump - Google Patents
Pressure type thermometer for liquid ring vacuum pump Download PDFInfo
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- CN215444407U CN215444407U CN202121210081.XU CN202121210081U CN215444407U CN 215444407 U CN215444407 U CN 215444407U CN 202121210081 U CN202121210081 U CN 202121210081U CN 215444407 U CN215444407 U CN 215444407U
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Abstract
The utility model provides a pressure type thermometer for a liquid ring vacuum pump, which comprises a pressure transmitting part, a display part, a temperature sensing part and a control part, wherein the pressure transmitting part adopts a corrugated pipe, the corrugated pipe has elasticity and can generate displacement under the action of pressure, a temperature bulb is required to be completely immersed in a measured medium during measurement, the corrugated pipe can further compensate the displacement of the temperature bulb and improve the accuracy of data, the temperature sensing part comprises a temperature bulb with a filter element, the liquid enters the temperature bulb and is accompanied with other impurities such as scale and the like, the service life of the temperature bulb is influenced, the accuracy of measured data is influenced, the filter element can further filter the liquid, the data is more accurate, a sealing ring is arranged on one side of the display part to prevent steam leakage from influencing the accuracy of the numerical value, the control part is arranged on the upper part of the temperature bulb and can freely control the temperature measurement at a certain time, the control part is provided with an air seal, so that water vapor can be effectively prevented from entering the display part.
Description
Technical Field
The utility model relates to a vacuum pump detection instrument, in particular to a pressure type thermometer for a liquid ring vacuum pump.
Background
Conventional liquid ring vacuum pumps typically use water as the working medium. The biasing vanes rotate in the pump chamber which is partially filled with liquid. Centrifugal force generated by the rotation of the vanes causes liquid in the pump chamber to form a liquid ring, and gas is transferred in the space between each vane and the liquid ring. The liquid ring vacuum pump often appears the condition of high temperature when using, influences equipment result of use, so install the inside temperature of pressure thermometer at any time detection.
Traditional pressure type thermometer is thin again long because the capillary, so can produce hysteresis when transmitting pressure, cause the response speed of thermometer to slow down, the steam of steam in capillary and spring tube takes place to vaporize or the condensation, can not be accurate, in time react the change of temperature, pressure thermometer's bulb and measured medium direct contact feel the temperature change, traditional pressure type thermometer does not do further protection to the bulb, liquid medium gets into the bulb along with impurity, and with water tank direct contact when pressure type thermometer installs, often along with the vibration during the temperature measurement, influence the accuracy of detection data.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: the present invention will solve the above problems by providing a pressure type thermometer for a liquid ring vacuum pump.
The technical scheme is as follows: the utility model provides a pressure type thermometer for liquid ring vacuum pump, including the bulb that has filter element, with bulb fixed connection's control element, and through bellows coupling between control element and the display device, the bulb is the direct component that touches the perception temperature change with the measured medium, and impurity in the liquid can directly influence the life of bulb to the bulb needs have certain anticorrosive performance, and some impurity that contain corrosivity can be filtered to the filter screen, improve the life of bulb. The bellows adopts minimum diameter, because the bellows has elasticity, can produce the displacement under the pressure effect to the temperature package need guarantee to submerge completely in the measured medium during the measurement, the bellows can carry out further compensation to the temperature package displacement, improves the accuracy of data.
In a further embodiment, the control element is driven by a screw, and the tail end of the upper part of the screw is sleeved with an air seal. The control element is used for controlling the quick closing of the temperature of the measured medium, the steam in the corrugated pipe and the display device can be vaporized and condensed due to the fluctuation of the measured temperature near the room temperature, the response of the liquid in the thermal bulb to the temperature is changed after the liquid is vaporized, the display device can be damaged due to severe expansion of the steam, and the air seal can effectively prevent the steam from entering when the temperature measurement is not needed, so that the temperature change can be correctly and timely reflected, and the display device is further protected from being damaged.
In a further embodiment, the filter element is sleeved on the periphery of the thermal bulb by adopting a filter screen thread, the diameter of the filter screen is larger than that of the thermal bulb due to volume expansion during thermal bulb measurement, the filter screen is preferably made of polytetrafluoroethylene, the filter screen can be used at high temperature for a long time, and the instantaneous temperature can reach 280 ℃.
In a further embodiment, the top end of the thermal bulb is fixedly connected to the lower end of the control element, and the pressure type thermometer is in direct contact with the water tank mounting plate when in use, so that the measurement value is influenced by the vibration of the water tank, and a buffer piece is sleeved between the control element and the thermal bulb.
In a further embodiment, one end of the corrugated pipe is fixedly connected to one side of the display device through a screw thread, and when the control element adjusts the displacement of the air seal, the other end of the corrugated pipe is in transition fit with the air seal, so that steam is prevented from entering the display device better.
In a further embodiment, to prevent pressure leakage, a sealing ring is provided at one side of the display device.
Has the advantages that: the utility model provides a pressure type thermometer for a liquid ring vacuum pump, which comprises a pressure transmitting part, a display part, a temperature sensing part and a control part, wherein the pressure transmitting part adopts a corrugated pipe, the corrugated pipe has elasticity and can generate displacement under the action of pressure, a temperature bulb is required to be completely immersed in a measured medium during measurement, the corrugated pipe can further compensate the displacement of the temperature bulb and improve the accuracy of data, the temperature sensing part comprises a temperature bulb with a filter element, the liquid enters the temperature bulb and is accompanied with other impurities such as scale and the like, the service life of the temperature bulb is influenced, the accuracy of measured data is influenced, the filter element can further filter the liquid, the data is more accurate, a sealing ring is arranged on one side of the display part to prevent steam leakage from influencing the accuracy of the numerical value, the control part is arranged on the upper part of the temperature bulb and can freely control the temperature measurement at a certain time, the control part is provided with an air seal, so that water vapor can be effectively prevented from entering the display part.
Drawings
FIG. 1 is an overall configuration diagram of the pressure thermometer of the present invention.
FIG. 2 is a schematic connection diagram of a display device according to the present invention.
Fig. 3 is a schematic connection diagram of the filter screen of the present invention.
The figures are numbered: the device comprises a display device 1, a corrugated pipe 2, a control element 3, a buffer 4, a thermal bulb 5, a filter screen 6, an air seal 7, a sealing ring 8 and a screw thread 9.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the utility model.
The applicant believes that the traditional pressure thermometer has a thin and long capillary tube, so that a hysteresis phenomenon is generated when pressure is transmitted, the response speed of the thermometer is reduced, steam in the capillary tube and the spring tube is vaporized or condensed and cannot correctly and timely reflect the change of temperature, a thermometer bulb 5 of the pressure thermometer is in direct contact with a measured medium to sense the temperature change, the traditional pressure thermometer does not further protect the thermometer bulb 5, the liquid medium enters the thermometer bulb 5 along with impurities, the pressure thermometer is in direct contact with a water tank when being installed, the temperature measurement is always accompanied with vibration, and the accuracy of detection data is affected.
In order to solve the above problems in the prior art, the present invention provides a pressure type thermometer for a liquid ring vacuum pump, the pressure type thermometer comprises a pressure transmitting part, a display part, a temperature sensing part and a control part, wherein the pressure transmitting part adopts a corrugated pipe 2, the pressure transmitting part transmits pressure sensitively, so that the response speed of the thermometer becomes high, the temperature sensing part comprises a thermometer bulb 5 with a filter element, liquid enters the thermometer bulb 5 and is often accompanied with other impurities such as incrustation scale and the like, the service life of the thermometer bulb 5 is influenced, the accuracy of measured data is influenced, the filter element can further filter the liquid, the data is more accurate, one side of the display part is provided with a sealing ring 8, the steam leakage is prevented from influencing the accuracy of the numerical value, the control part is arranged at the upper part of the thermometer bulb 5, the temperature measurement at a certain time can be freely controlled, and the control part is provided with an air seal 7, so that water vapor can be effectively prevented from entering the display part.
The specific scheme is as follows:
a pressure type thermometer for liquid ring vacuum pump, including the bulb 5 with filter element, the control element 3 fixedly connected with said bulb 5, and connect through the corrugated pipe 2 between display unit 1 and the said control element 3, because the pressure type thermometer of the utility model is suitable for the liquid ring vacuum pump, the temperature sensing medium that is packed in the bulb 5 is the liquid, the bulb 5 is the component that the medium of the direct contact of the temperature of the measured is felt to change, the impurity in the liquid can influence the service life of the bulb 5 directly, and the bulb 5 needs to have certain corrosion resisting properties, the filter screen 6 can filter some impurity containing corrosivity, improve the service life of the bulb 5. The top of the thermal bulb 5 is fixedly connected to the lower end of the control element 3 through a screw thread 9, and the thermal bulb is in direct contact with a water tank mounting plate when the pressure type thermometer is used, so that the water tank vibration is avoided, the measurement value is influenced, and a buffer part 4 is sleeved between the control element 3 and the thermal bulb 5. Bellows 2 adopts minimum diameter, because bellows 2 has elasticity, can produce the displacement under the pressure effect to during the measurement thermal bulb 5 need guarantee to submerge completely in the measured medium, bellows 2 can do further compensation to thermal bulb 5 displacement, and bellows 2's pipe wall is thinner, and is high temperature resistant, has good sensitivity during the transmission pressure, and bellows 2 has good leakproofness, effectively prevents to reveal, improves the accuracy of data. One end of the corrugated pipe 2 is fixedly connected to one side of the display device 1 through a screw thread 9, and a sealing ring 8 is arranged on one side of the display device 1 for preventing leakage. The filter element is sleeved on the periphery of the thermal bulb 5 by the filter screen 6, the volume of the thermal bulb 5 expands during measurement, the diameter of the filter screen 6 is larger than that of the thermal bulb 5, the filter screen 6 is preferably made of polytetrafluoroethylene, the filter element can be used at high temperature for a long time, the instantaneous temperature can reach 280 ℃, and the instantaneous temperature conforms to the limit degree of the display device 1. The control element 3 is driven by a screw rod, and the tail end of the upper part of the screw rod is sleeved with an air seal 7. The control element 3 is used for controlling the switch of the temperature of the measured medium, and under the condition of not measuring, when the control element 3 regulates the displacement of the air seal 7, the other end is in transition fit with the air seal 7, so that the steam is prevented from entering better. Because the temperature to be measured fluctuates near the room temperature, the steam in the corrugated pipe 2 and the display device 1 can be vaporized and condensed, the response with the temperature changes after the liquid in the thermal bulb 5 is vaporized, and the display device 1 can be damaged due to severe expansion of the steam, and the air seal 7 can effectively prevent the steam from entering when the temperature measurement is not needed, so that the temperature change can be correctly and timely reflected, and the display device 1 is further protected from being damaged.
The working contents of the utility model are as follows: the gas and water that the liquid ring vacuum pump gets into the water tank through the blast pipe, put the pressure type thermometer into the water tank, insert the temperature bulb 5 of the thermometer in the medium to be measured totally, in order to reduce the heat conduction error, the medium gets into the temperature bulb 5 through the filter screen 6, the working medium in the temperature bulb 5 causes the pressure increase because of the volume expansion of temperature rise, because the temperature bulb 5 bellows 2 forms the enclosed construction with the inside of display device, under the drive of the working medium, when the temperature bulb 5 feels the temperature change, the saturated steam of the enclosed system produces the corresponding pressure, the pressure change is conveyed to the change of the curvature of the elastic element causing through the bellows 2, make its free end displace, and then change the displacement into the indicated value with the help of the drive mechanism, can carry on the medium measurement according to the temperature indicated on the indicating dial at this moment.
In addition, when the temperature of the medium is measured, the pressure can be controlled to enter the corrugated pipe 2 through the control switch, the control switch rotates clockwise, a gap is formed between the air seal 7 and the corrugated pipe 2 downwards, the pressure can enter the corrugated pipe 2 for measurement, when the measurement is not needed, the control switch rotates anticlockwise again, the air seal 7 is attached to the corrugated pipe 2 upwards and closely, a pressure path is cut off, and steam is further prevented from entering.
As noted above, while the present invention has been shown and described with reference to certain preferred embodiments, it is not to be construed as limited thereto. Various changes in form and detail may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.
Claims (6)
1. A pressure type thermometer for a liquid ring vacuum pump is characterized by comprising a thermometer bulb with a filter element, a control element fixedly connected with the thermometer bulb, and a display device connected with the control element through a corrugated pipe.
2. A pressure thermometer for a liquid ring vacuum pump as defined in claim 1 wherein: the control element is driven by a screw rod, and the tail end of the upper part of the screw rod is sleeved with an air seal.
3. A pressure thermometer for a liquid ring vacuum pump as defined in claim 1 wherein: the filter element is sleeved on the periphery of the thermal bulb by adopting filter screen threads, and the diameter of the filter screen is larger than that of the thermal bulb.
4. A pressure thermometer for a liquid ring vacuum pump as defined in claim 3 wherein: the top end of the thermal bulb is fixedly connected to the lower end of the control element, and a buffer piece is sleeved between the control element and the thermal bulb.
5. A pressure thermometer for a liquid ring vacuum pump as defined in claim 1 wherein: one end of the corrugated pipe is fixedly connected to one side of the display device, and the other end of the corrugated pipe is in transition fit with the air seal.
6. A pressure thermometer for a liquid ring vacuum pump as defined in claim 5 wherein: and a sealing ring is arranged on one side of the display device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121210081.XU CN215444407U (en) | 2021-06-01 | 2021-06-01 | Pressure type thermometer for liquid ring vacuum pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121210081.XU CN215444407U (en) | 2021-06-01 | 2021-06-01 | Pressure type thermometer for liquid ring vacuum pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215444407U true CN215444407U (en) | 2022-01-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121210081.XU Active CN215444407U (en) | 2021-06-01 | 2021-06-01 | Pressure type thermometer for liquid ring vacuum pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215444407U (en) |
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2021
- 2021-06-01 CN CN202121210081.XU patent/CN215444407U/en active Active
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