CN219038268U

CN219038268U - Clamp special for double-needle double-tube pressure gauge

Info

Publication number: CN219038268U
Application number: CN202320019360.0U
Authority: CN
Inventors: 王同宾; 孙金晨; 庄涛; 王振宇; 孟一喆; 刘鑫; 于清平
Original assignee: Liaoning Institute of Metrology
Current assignee: Liaoning Institute of Metrology
Priority date: 2023-01-05
Filing date: 2023-01-05
Publication date: 2023-05-16
Anticipated expiration: 2033-01-05

Abstract

The utility model belongs to the technical field of pressure measurement, and particularly relates to a special fixture for a double-needle double-tube pressure gauge. The special fixture can enable the double-needle double-tube pressure gauge to be connected with standard equipment quickly and reliably. Comprises a base; an internal channel is formed in the base; the base is provided with at least two gauge stands communicated with the internal channel; the inner pipeline of each gauge stand is communicated with the inner channel, a one-way check valve is assembled at the bottom interface of the gauge stand, and when the detected gauge is positioned in the gauge stand, the detected gauge interface is communicated with the inner channel; the free end of the internal channel is provided with an air inlet which is connected with the detection standard device; the pressure gauge compression bar used for fixing the detected gauge is arranged on the upper surface of the base and above the gauge stand.

Description

Clamp special for double-needle double-tube pressure gauge

Technical Field

The utility model belongs to the technical field of pressure measurement, and particularly relates to a special fixture for a double-needle double-tube pressure gauge.

Background

The double-needle double-tube pressure meter uses two sets of independent spring tubes as pressure sensing elements in one meter body, and simultaneously measures and indicates pointer type meters of pressure values of two different positions. The pressure gauge has the advantages of simple structure, convenient use and low cost, and has the electromagnetic interference resistance in the use process due to the pure mechanical structure, so the pressure gauge is widely applied to the industries of railways, urban rail transit and the like.

The accuracy of the two-needle two-tube pressure representation value directly relates to the use safety of tested equipment, so that the JJG52-2013 elastic element type general pressure gauge, pressure vacuum gauge and JJJG 193 (railway) -2007 special pressure gauge for rolling stock are definitely regulated, and the metering verification needs to be carried out every half year.

To measure and detect the double-needle double-tube pressure meter, the tested meter needs to be connected with a detection standard device. At present, a threaded connection mode is adopted, and the connection mode has some disadvantages.

Firstly, the operation is complicated. The threaded joint is required to be repeatedly rotated during installation and disassembly, and because the distance between the two interfaces is relatively short and the use of operating tools such as a spanner is limited, the difficulty of installation and disassembly is increased.

Secondly, the reliability is not high. When in connection, the sealing is carried out by means of a raw material belt and sealant, and if the operation is improper, the tightness can be affected, so that the detection value is inaccurate.

Disclosure of Invention

The utility model provides a special fixture for a double-needle double-tube pressure gauge, aiming at the defects existing in the prior art. The special fixture can enable the double-needle double-tube pressure gauge to be connected with standard equipment quickly and reliably.

In order to achieve the above purpose, the utility model adopts the following technical scheme that the utility model comprises a base; the novel water heater is characterized in that an internal channel is formed in the base.

The base is provided with at least two gauge stands communicated with the internal channel.

And the internal pipeline of each gauge stand is communicated with the internal channel, and the interface at the bottom of the gauge stand is provided with a one-way check valve, so that when the detected gauge is positioned in the gauge stand, the detected gauge interface is communicated with the internal channel.

The free end of the inner channel is provided with an air inlet which is connected with the detection standard device.

The pressure gauge compression bar used for fixing the detected gauge is arranged on the upper surface of the base and above the gauge stand.

Further, the one-way check valve is installed at a connection port of the internal pipeline and the internal channel.

Furthermore, an O-shaped sealing ring is arranged at the joint of the valve seat of the one-way check valve and the connecting port.

Further, the number of the gauge stands is four, wherein the gauge stands are two by two and are one group; two gauge stands in each group are used for fixing a double-needle double-tube pressure gauge.

Further, the pressure gauge compression bar is divided into three parts: the arc-shaped parts on the left side and the right side, and the horizontal connecting rod between the two arc-shaped parts are fixedly connected into an integrated structure; the free ends of the two arc-shaped parts are connected with the upper surface of the base through vertical guide mechanisms; the horizontal connecting rod is fixedly connected with the upper surface of the base through a first positioning guide rod, a through hole is formed in the horizontal connecting rod, the bottom of the first positioning guide rod is fixedly connected with the base, and the top of the first positioning guide rod penetrates through the through hole.

Further, the top end of the first positioning guide rod is hinged with a cam handle.

Further, the vertical guide mechanism comprises a positioning sleeve fixedly connected with the free end of the pressure gauge pressure rod and a second positioning guide rod, the bottom of the second positioning guide rod is fixedly connected with the base, a reset spring is arranged in the positioning sleeve, and the top end of the second positioning guide rod extends into the positioning sleeve and contacts with the lower part of the reset spring; and the top of the second positioning guide rod is always positioned in the positioning sleeve when sliding up and down along the positioning sleeve.

Compared with the prior art, the utility model has the beneficial effects.

The utility model belongs to a practical tool matched with the instrument in the pressure measurement field in the instrument detection process, has the characteristics of simple operation, high connection speed, good sealing performance and strong universality, can be widely applied in the double-needle double-tube pressure meter measurement detection field, can reduce the labor intensity of detection personnel in the detection process, can greatly improve the detection efficiency of the instrument, and can well ensure the timeliness of detection.

Drawings

The utility model is further described below with reference to the drawings and the detailed description. The scope of the present utility model is not limited to the following description.

FIG. 1 is a schematic diagram of a dual needle dual tube pressure gauge specific clamp.

Fig. 2 is a schematic diagram of the connection and positional relationship between the table to be inspected and the table base.

FIG. 3 is a schematic view of a two-pin, two-tube manometer when installed in a piece of special furniture.

In the figure, 1 is a base, 2 is a reset spring, 3 is a positioning sleeve, 4 is an air inlet, 5 is a gauge stand, 6 is a one-way check valve, 7 is an O-shaped sealing ring, 8 is a pressure gauge compression bar, 9 is a cam handle, 10 is a second positioning guide rod, 11 is a first positioning guide rod, 12 is a horizontal connecting rod, and 13 is a gauge interface.

Detailed Description

As shown in fig. 1-3, the special fixture for the double-needle double-tube pressure gauge: comprises a base 1; an internal channel is formed in the base 1; the base 1 is provided with at least two gauge stands 5 communicated with the internal channel; the internal pipeline of each gauge stand 5 is communicated with the internal channel, a one-way check valve 6 is assembled at the bottom interface of the gauge stand 5, and when the detected gauge is positioned in the gauge stand 5, the detected gauge interface 13 is communicated with the internal channel; the free end of the internal channel is provided with an air inlet 4, and the air inlet 4 is connected with a detection standard device; the pressure gauge compression bar 8 for fixing the gauge to be detected is arranged on the upper surface of the base 1 and above the gauge stand 5.

In embodiment 1, the one-way check valve 6 is installed at the connection port of the internal pipe and the internal channel. An O-shaped sealing ring 7 is arranged at the joint of the valve seat of the one-way check valve 6 and the connecting port. The number of the gauge stands 5 is four, wherein two gauge stands 5 are in a group; the two gauge stands 5 in each group are used for fixing a double-needle double-tube pressure gauge.

Example 2, the pressure gauge stem 8 is divided into three parts: the arc parts at the left side and the right side, and a horizontal connecting rod 12 between the two arc parts are fixedly connected into an integrated structure; wherein, the free ends of the two arc-shaped parts are connected with the upper surface of the base 1 through a vertical guide mechanism; the horizontal connecting rod 12 is fixedly connected with the upper surface of the base 1 through a first positioning guide rod 11, a through hole is formed in the horizontal connecting rod 12, the bottom of the first positioning guide rod 11 is fixedly connected with the base 1, the top of the first positioning guide rod 11 penetrates through the through hole, and the radius of the through hole is larger than that of the first positioning guide rod 11; the top end of the first positioning guide rod 11 is connected (hinged) with a cam handle 9 to form a cam locking mechanism (i.e. the cam end of the cam locking rod is additionally provided with a handle which is sold in the market and is not described herein), the handle acts to drive the cam to move up and down, and the rotation of the cam action is changed into the up and down movement of the first positioning guide rod 11, so that the compression or release of the pressure gauge compression rod 8 is realized.

The embodiment 3, the vertical guiding mechanism comprises a positioning sleeve 3 fixedly connected with the free end of a pressure gauge compression bar 8, and a second positioning guide rod 10, wherein the bottom of the second positioning guide rod is fixedly connected with the base 1, a reset spring 2 is arranged in the positioning sleeve 3, and the top end of the second positioning guide rod 10 extends into the positioning sleeve 3 and contacts with the lower part of the reset spring 2; and the top of the second positioning guide rod 10 is always positioned in the positioning sleeve 3 when sliding up and down along the positioning sleeve 3. I.e. the second positioning guide 10 is not always disengaged from the positioning sleeve 3. Specifically, the bottom of the return spring 2 may be connected to the second positioning guide 10.

Specifically, for refinement: the special fixture comprises a base 1, a gauge stand 5, a pressure gauge compression bar 8, a positioning guide rod, a cam handle 9 and the like. The base 1 has a supporting function on the whole fixture device, and the internal pipeline is connected with the standard device through a quick connector. Every 2 gauge stands 5 are in a group, confirm interface interval according to the requirement of two pipe manometers of two needles, cooperate O type sealing washer 7 to seal, the inside one-way check valve 6 that all is equipped with of every gauge stand 5 simultaneously, only after the gauge is pressed from both sides by the anchor clamps and adorns working position by the clamp, interface and gauge stand 5 inside pipeline just can communicate, if no gauge is connected, then one-way check valve 6 receives the combined action of spring effort and the inside pressure of base 1 pipeline, be in the dead position of lock, interface and the inside pipeline of base 1 do not communicate, guarantee the holistic leakproofness of anchor clamps.

The pressure gauge compression bar 8, the positioning guide rod and the cam handle 9 jointly form a clamping and fixing module of the double-needle double-tube pressure gauge. The compression bar 8 adopts an arch design, can be matched with the shape of the shell of the double-needle double-tube pressure gauge, has a fixing effect on the gauge to be detected, can avoid the deviation of the clamping position, can ensure that the gauge stand 5 is uniformly stressed, and improves the tightness; the positioning guide rod and the positioning sleeve 3 form a piston structure, so that the stress direction of the detected meter is always kept in the direction vertical to the meter seat 5 during clamping; the front end of the cam handle 9 adopts a cam design, when the operating handle is rotated, the cam converts the arc stroke into linear motion, so that the compression bar 8 is forced to move and bear force along the direction of the first positioning guide rod 11, the detected meter is ensured to be firmly fixed on the meter seat 5, and the clamping time and labor intensity are reduced.

The double-needle double-tube pressure gauge is provided with 2 threaded interfaces, and each time the double-needle double-tube pressure gauge is connected with the standard device in a detection mode, 2 threaded connectors corresponding to the standard device in size and specification are required to be used for connection, each connector is required to be rotated 8-10 circles until being screwed up in the connection mode, the operation process is limited by a narrow distance between the two interfaces, and tools such as a spanner and the like are not easy to operate. According to the utility model, the gauge stand 5 is adopted to be positioned and matched with the O-shaped sealing ring 7 for sealing, and the good sealing effect can be achieved without using consumable materials such as raw material belts, sealing glue and the like; in addition, the step of rotating and connecting the screwed joint is omitted in the clamping process, and the detected meter can be firmly fixed on the meter seat 5 only by rotating the cam handle 9 by about 90 degrees without any tool, so that quick connection is realized; meanwhile, the utility model also adopts a double-epitope design, and at most 2 checked watches can be clamped rapidly each time, so that the clamping efficiency is greatly improved; in addition, when only one epitope is used for clamping, the pressure interface of the other epitope can realize automatic sealing, so that the integral tightness of the clamp is ensured, and the applicability of clamping under different conditions is improved.

It should be understood that the foregoing detailed description of the present utility model is provided for illustration only and is not limited to the technical solutions described in the embodiments of the present utility model, and those skilled in the art should understand that the present utility model may be modified or substituted for the same technical effects; as long as the use requirement is met, the utility model is within the protection scope of the utility model.

Claims

1. The special fixture for the double-needle double-tube pressure gauge comprises a base; the method is characterized in that: an internal channel is formed in the base;

the base is provided with at least two gauge stands communicated with the internal channel;

the inner pipeline of each gauge stand is communicated with the inner channel, a one-way check valve is assembled at the bottom interface of the gauge stand, and when the detected gauge is positioned in the gauge stand, the detected gauge interface is communicated with the inner channel;

the free end of the internal channel is provided with an air inlet which is connected with the detection standard device;

2. The dual needle dual tube manometer special fixture of claim 1, wherein: the one-way check valve is arranged at a connecting port of the internal pipeline and the internal channel.

3. The dual needle dual tube manometer special fixture of claim 2, wherein: an O-shaped sealing ring is arranged at the joint of the valve seat of the one-way check valve and the connecting port.

4. The dual needle dual tube manometer special fixture of claim 1, wherein: the number of the gauge stands is four, wherein the gauge stands are two by two and are in a group; two gauge stands in each group are used for fixing a double-needle double-tube pressure gauge.

5. The dual needle dual tube manometer special fixture of claim 4, wherein: the pressure gauge compression bar is divided into three parts: the arc-shaped parts on the left side and the right side, and the horizontal connecting rod between the two arc-shaped parts are fixedly connected into an integrated structure;

the free ends of the two arc-shaped parts are connected with the upper surface of the base through vertical guide mechanisms;

the horizontal connecting rod is fixedly connected with the upper surface of the base through a first positioning guide rod, a through hole is formed in the horizontal connecting rod, the bottom of the first positioning guide rod is fixedly connected with the base, and the top of the first positioning guide rod penetrates through the through hole.

6. The dual needle dual tube manometer special fixture of claim 5, wherein: and the top end of the first positioning guide rod is hinged with a cam handle.

7. The dual needle dual tube manometer special fixture of claim 1, wherein: the vertical guide mechanism comprises a positioning sleeve fixedly connected with the free end of the pressure rod of the pressure gauge, and a second positioning guide rod fixedly connected with the base at the bottom, a reset spring is arranged in the positioning sleeve, and the top end of the second positioning guide rod extends into the positioning sleeve and contacts with the lower part of the reset spring; and the top of the second positioning guide rod is always positioned in the positioning sleeve when sliding up and down along the positioning sleeve.