WO2015006945A1 - 压力表 - Google Patents
压力表 Download PDFInfo
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- WO2015006945A1 WO2015006945A1 PCT/CN2013/079558 CN2013079558W WO2015006945A1 WO 2015006945 A1 WO2015006945 A1 WO 2015006945A1 CN 2013079558 W CN2013079558 W CN 2013079558W WO 2015006945 A1 WO2015006945 A1 WO 2015006945A1
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- WO
- WIPO (PCT)
- Prior art keywords
- pressure gauge
- spring tube
- hole
- base
- pointer shaft
- Prior art date
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L7/00—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements
- G01L7/02—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of elastically-deformable gauges
- G01L7/04—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of elastically-deformable gauges in the form of flexible, deformable tubes, e.g. Bourdon gauges
- G01L7/043—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of elastically-deformable gauges in the form of flexible, deformable tubes, e.g. Bourdon gauges with mechanical transmitting or indicating means
Definitions
- the utility model relates to the technical field of industrial instruments, and more particularly to a pressure gauge.
- a pressure gauge is usually used to measure the pressure in the pressure vessel.
- the common pressure gauge works by: when the gas in the pressure vessel enters In the C-shaped spring tube, at this time, the free end of the spring tube is displaced (the spring tube expands outward when the measured pressure is greater than the atmospheric pressure, when the measured pressure is less than the atmospheric pressure)shrinking inward), and then through the transmission amplification mechanism, sector gear, pinion and other structures to drive the pointer to deflect, indicating the magnitude of the pressure.
- Such a pressure gauge has a complicated structure and a high cost.
- the technical problem to be solved by the present invention is to provide a pressure gauge with simple structure and low cost in view of the complicated structure and high cost of the above-mentioned pressure gauge of the prior art.
- the utility model constructs a pressure gauge comprising a base, a spring tube disposed on the base and having a C shape, a pointer shaft rotatably mounted on the base, and a pointer fixedly connected to the pointer shaft And an indicating panel; the spring tube is coupled to the pointer shaft and can rotate the pointer shaft; and one end of the spring tube is provided with a fixing portion bent toward the center of the base and communicating with the spring tube An end surface of the base adjacent to the spring tube is provided with a convex mounting portion, and the mounting portion is provided with an opening groove adapted to the fixing portion; the fixing portion is installed at the mounting portion In the open groove, a bottom portion of the open groove is provided with a first through hole for gas circulation, and the first through hole communicates with the fixing portion.
- the mounting portion includes a cylindrical body disposed at a center position of the base and a mounting plate extending from an outer circumferential surface of the cylindrical body; the open groove is a cylinder A center position of the body extends toward the mounting plate, and an opening of the open slot is disposed on a side of the mounting plate away from the cylinder.
- the The pressure gauge further includes a connecting pipe; one end of the connecting pipe is in communication with the fixing portion, and the other end is in communication with the first through hole.
- the indicator panel is fixedly mounted on the mounting portion by a first screw member.
- the The pressure gauge further includes a transparent cover and a case; the base, the spring tube, the pointer shaft, the pointer, and the indicating panel are all disposed in the case; the transparent cover is installed in the The top of the case.
- the The pressure gauge further includes a pull rod; one end of the pull rod is connected to an end of the spring tube away from the fixing portion, and the other end of the pull rod is connected with the pointer shaft.
- the two ends of the pull rod are respectively provided with a hook portion; the two hook portions are bent toward each other; the one end of the spring tube away from the fixing portion is provided with a connecting piece; the connecting piece is provided with a first connecting hole; An annular boss coaxial with the pointer shaft is disposed on an outer circumferential surface of the pointer shaft; a second connecting hole is disposed on the annular boss; and the two hook portions are respectively correspondingly engaged a connection hole and the second connection hole.
- the a threaded connection member for mounting the pressure gauge on the pressure vessel is disposed at a center position of the bottom end of the base; a second through hole is disposed on the threaded connection member; the second through hole and the first through hole are Connected.
- two indicating members for limiting the range of rotation of the pointer are mounted on the indicating panel.
- the indicator panel is provided with a scale mark; and the scale mark is provided with a high-precision indication area.
- the pressure gauge adopts a fixing portion at one end of the spring tube, an end surface adjacent to the spring tube on the base is provided with a mounting portion, an opening groove in which the mounting portion is provided on the mounting portion, and a bottom portion of the opening groove is provided.
- the structure such as the first through hole through which the gas flows and communicates with the fixed portion has a simple structure and a low cost.
- FIG. 1 is a schematic exploded view of a pressure gauge according to a preferred embodiment of the present invention.
- Figure 2 is a perspective view showing the inside of the pressure gauge shown in Figure 1;
- Figure 3 is a perspective view showing the three-dimensional structure of the tie rod connecting spring tube and the pointer shaft in the pressure gauge shown in Figure 1;
- Figure 4 is a perspective view showing the structure of the base in the pressure gauge shown in Figure 1;
- FIG 5 is another perspective structural view of the base in the pressure gauge shown in Figure 1;
- Figure 6 is a perspective structural view of the pointer shaft in the pressure gauge shown in Figure 1;
- Figure 7 is a perspective view showing the structure of the tie rod in the pressure gauge shown in Figure 1;
- Fig. 8 is a schematic structural view of an indication panel in the pressure gauge shown in Fig. 1.
- a preferred embodiment of the present invention provides a pressure gauge including The base 1, the spring tube 2, the pointer shaft 3, the pointer 4, and the indicator panel 5.
- the base 1 is generally a disc structure.
- the spring tube 2 is C-shaped and is disposed on the base 1.
- the spring tube 2 is also called a Baden tube, when the gas in the pressure vessel enters When the inside of the spring tube 2 is
- the spring tube 2 produces an inwardly contracting or outwardly expanding motion.
- the pointer shaft 3 is substantially cylindrical in shape and is rotatably mounted on the base 1.
- the spring tube 2 is connected to the pointer shaft 3 to drive the pointer shaft 3 to rotate.
- the pointer shaft 3 is fixedly connected to the pointer 4 through the indicator panel 5, so that the pointer shaft 3 can rotate the pointer 4 when it is rotated.
- one end of the spring tube 2 is provided with a fixing portion 21 bent toward the center of the base 1, and the fixing portion 21 communicates with the spring tube 2 and is fixedly connected.
- the fixing portion 21 is similar in shape to the spring tube 2, and both of them can adopt an integrally formed structure.
- the top of the base 1 is provided with a mounting portion 11 which is convex.
- the mounting portion 11 is provided with an opening groove 12 adapted to the fixing portion 21.
- the opening groove 12 is substantially waist-shaped, and the fixing portion 21 is mounted in the opening groove 12, and the spring tube 2 can be stably disposed on the base 1.
- the mounting portion 11 includes a cylindrical body 111 disposed at a center position of the base 1, and a mounting plate 112 extending from an outer circumferential surface of the cylindrical body 111.
- the open groove 12 extends from the center position of the cylindrical body 111 toward the mounting plate 112, and the opening of the open groove 12 is provided on the side of the mounting plate 112 away from the cylindrical body 111.
- the mounting portion 11 can also adopt other structures.
- the mounting portion 11 can adopt a structure such as a rectangular parallelepiped or a rectangular parallelepiped.
- the bottom of the open groove 12 is provided with a first through hole 13 for supplying a gas.
- the first through hole 13 is a circular hole that communicates with the fixing portion 21.
- the fixing portion 21 is provided with a structure that communicates with the first through hole 13 so that the gas in the first through hole 13 can flow into the fixing portion 21.
- the indicator panel 5 is provided with a scale mark 52 for indicating the pressure value.
- the scale mark 52 is provided with a high-precision indicating area 53 which is an area in which the pressure gauge has the smallest error and the highest precision.
- the high-precision indicating area 53 is set according to the characteristics (such as thickness, volume, etc.) of the selected spring tube 2. It can be understood that the selected spring tube 2 is different, and the numerical range of the high-precision indicating area 53 is also different.
- the pressure gauge can perform a higher precision measurement on a certain pressure point. With the above structure, the manufacturing process of the pressure gauge is simplified, thereby reducing the production cost of the pressure gauge.
- the pressure gauge further includes a connecting tube 22.
- the connecting pipe 22 has an L shape, one end of which is in communication with the fixing portion 21, and the other end of which is in communication with the first through hole 13. It can be understood that the connecting pipe 22 is not limited to the L-shaped structure, and other structures, such as an elongated shape, may be adopted, and only the communication between the first through hole 13 and the fixing portion 21 can be realized.
- the limiting member 51 is substantially a round rod structure, and two limiting members 51 are respectively disposed on both sides of the scale marking 52 in the indicating panel 5 for limiting the range of rotation of the pointer 4.
- the limiting member 51 can adopt a structure of a screw connection or a pin.
- the indicator panel 5 is fixedly mounted on the mounting portion 11 by the first screw member 9.
- the first screw member 9 is provided with two, and the two first screw members 9 are evenly arranged and fixedly connected to the top end of the mounting portion 11 through the indicator panel 5.
- the pressure gauge further includes a transparent cover 7 , a case 8 and a second screw 10 .
- the base 1, the spring tube 2, the pointer shaft 3, the pointer 4, and the indicating panel 5 are all disposed inside the watch case 8.
- the transparent cover 7 is attached to the top of the watch case 8, so that the above structure is hermetically disposed in the space formed by the transparent cover 7 and the case 8.
- the second screw member 10 passes through the watch case 8 and is coupled to the bottom of the base 1, so that the watch case 8 is fixedly mounted on the base 1.
- the second screw member 10 is also provided with two, and the two second screw members 10 are evenly arranged on the watch case 8. It can be understood that the number of the first screw member 9 and the second screw member 10 can also have other options.
- the pressure gauge further includes a tie rod 6 .
- One end of the tie rod 6 is connected to one end of the spring tube 2 remote from the fixing portion 21, and the other end of the tie rod 6 is connected to the pointer shaft 3.
- the two ends of the tie rod 6 are respectively provided with hook portions 61.
- the two hook portions 61 are connected to the spring tube 2 and the pointer shaft 3, respectively.
- a connecting piece 23 is disposed at one end of the spring tube 2 away from the fixing portion 21 .
- the connecting piece 23 has a substantially circular sheet-like structure on which a first connecting hole 24 is provided.
- the outer circumferential surface of the pointer shaft 3 is provided with an annular boss 31 which is coaxial with the pointer shaft 3.
- a second connecting hole 32 is disposed on the annular boss 31. The two hook portions 61 are respectively engaged in the first connecting hole 24 and the second connecting hole 32 such that the tie rod 6 is connected between the spring tube 2 and the pointer shaft 3.
- a threaded connection member 14 is provided at the center of the bottom end of the base 1.
- the threaded connection 14 is an externally threaded connection by which the pressure gauge can be mounted on a pressure vessel.
- a second through hole 15 is provided in the threaded connection member 14.
- the second through hole 15 is a circular hole that communicates with the first through hole 13.
- the second through holes 15 are coaxial with the threaded connecting member 14 and the first through hole 13 respectively.
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- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
一种压力表，包括底座（1）、弹簧管（2）、指针轴（3）、指针（4）以及指示面板（5）;弹簧管（2）与指针轴（3）连接，并可带动指针轴（3）转动；弹簧管（2）的一端设置有固定部（21）；底座（1）设置有安装部（11），安装部（11）中设置有开口槽（12）；固定部（21）安装在开口槽（12）中；开口槽（12）的底部设置有用于供气体流通的第一通孔（13），第一通孔（13）与固定部（21）相连通。该压力表结构简单、成本较低。
Description
本实用新型涉及工业仪表技术领域，更具体地说，涉及一种压力表。
现有技术中，通常采用压力表以测量压力容器中的压力。常见的压力表的工作原理为：当压力容器中的气体进入
呈C形的弹簧管内，此时，弹簧管的 自由端产生位移（当被测的压力大于大气压力作用时 弹簧管 向外扩张，当被测的压力小于大气压力的作用时 弹簧管
向内收缩），然后依次经过传动放大机构、扇形齿轮、小齿轮等结构带动指针偏转，从而指示出压力的大小。此种压力表的结构复杂，成本较高。
本实用新型要解决的技术问题在于，针对现有技术的上述的压力表的结构复杂、成本较高的缺陷，提供一种结构简单、成本较低的压力表。
本实用新型解决其技术问题所采用的技术方案是：
本实用新型构造了一种压力表，包括底座、设置在所述底座上并呈C形的弹簧管、可转动地安装在所述底座上的指针轴、固定连接在所述指针轴上的指针以及指示面板；所述弹簧管与所述指针轴连接、并可带动所述指针轴转动；所述弹簧管的一端设置有向所述底座中心弯折并与所述弹簧管相连通的固定部；所述底座上与所述弹簧管相邻的端面设置有呈凸起状的安装部，所述安装部上设置有与所述固定部相适配的开口槽；所述固定部安装在所述开口槽中；所述开口槽的底部设置有用于供气体流通的第一通孔，所述第一通孔与所述固定部相连通。
在本实用新型所述的压力表中，所述安装部包括设置于所述底座的中心位置处的圆柱体以及由所述圆柱体的外圆周面延伸出的安装板；所述开口槽由圆柱体的中心位置向所述安装板延伸，且所述开口槽的开口设置在所述安装板上远离所述圆柱体的一侧。
在本实用新型所述的压力表中，所述
压力表还包括连接管；所述连接管的一端与所述固定部相连通，另一端与所述第一通孔相连通。
在本实用新型所述的压力表中，所述指示面板通过第一螺纹件固定安装在所述安装部上。
在本实用新型所述的压力表中，所述
压力表还包括透明表盖以及表壳；所述底座、所述弹簧管、所述指针轴、所述指针以及所述指示面板均设置在所述表壳内；所述透明表盖安装在所述表壳的顶部。
在本实用新型所述的压力表中，所述
压力表还包括拉杆；所述拉杆的一端与所述弹簧管上远离所述固定部的一端连接，所述拉杆的另一端与所述指针轴连接。
在本实用新型所述的压力表中，所述
拉杆的两端分别设置有弯钩部；两个所述弯钩部相向弯折；所述弹簧管上远离所述固定部的一端设置有连接片；所述连接片上设置有第一连接孔；所述指针轴的外圆周面上设置有与所述指针轴同轴的环形凸台；所述环形凸台上设置有第二连接孔；两个所述弯钩部分别对应地卡接在第一连接孔与所述第二连接孔中。
在本实用新型所述的压力表中，所述
底座的底端中心位置处设置有用于将所述压力表安装在压力容器上的螺纹连接件；所述螺纹连接件上设置第二通孔；所述第二通孔与所述第一通孔相连通。
在本实用新型所述的压力表中，所述指示面板上安装有两个用于限制所述指针的转动范围的限位件。
在本实用新型所述的压力表中，所述 指示面板上设置有刻度标识；所述刻度标识上设置有高精度指示区。
实施本实用新型的压力表
，具有以下有益效果：压力表采用弹簧管的一端设置有固定部、底座上与弹簧管相邻的端面设置有安装部、安装部上设置有安装固定部的开口槽、开口槽的底部设置有用于供气体流通并与固定部相连通的第一通孔等结构，其结构简单、成本较低。
下面将结合附图及实施例对本实用新型作进一步说明，附图中：
图1是本实用新型较佳实施例提供的压力表的爆炸示意图；
图2是图1所示的压力表内部的立体结构示意图；
图3是图1所示的压力表中的拉杆连接弹簧管与指针轴的立体结构示意图；
图4是图1所示的压力表中的底座的立体结构示意图；
图5是图1所示的压力表中的底座的另一立体结构示意图；
图6是图1所示的压力表中的指针轴的立体结构示意图；
图7是图1所示的压力表中的拉杆的立体结构示意图；
图8是图1所示的压力表中的指示面板的结构示意图。
为了对本实用新型的技术特征、目的和效果有更加清楚的理解，现对照附图详细说明本实用新型的具体实施方式。
如图1、图2、图3所示，本实用新型的较佳实施例提供一种压力表，其包括
底座1、弹簧管2、指针轴3、指针4以及指示面板5。底座1大致为圆盘结构。弹簧管2呈C形，其设置在底座1上。弹簧管2也称之为巴登管，当压力容器中的气体进入
弹簧管2的内部时，
弹簧管2会产生向内收缩或向外扩张运动。指针轴3大致为圆柱状结构，其可转动地安装在底座1上。弹簧管2与指针轴3连接，可带动指针轴3转动。指针轴3穿过指示面板5与指针4固定连接，从而使得指针轴3转动时可带动指针4转动。该实施例中，弹簧管2的一端设置有向底座1中心弯折的固定部21，该固定部21与弹簧管2相连通并固定连接。可以理解的是，固定部21与弹簧管2的形状材质类似，两者可采用一体成型的结构。
如图4所示，底座1的顶部设置有呈凸起状的安装部11。该安装部11上设置有与固定部21相适配的开口槽12。该开口槽12大致为腰形，固定部21安装在开口槽12中，可以将弹簧管2稳固地设置在底座1上。该实施例中，安装部11包括设置于底座1的中心位置处的圆柱体111以及由该圆柱体111的外圆周面延伸出的安装板112。开口槽12由圆柱体111的中心位置向安装板112延伸，且开口槽12的开口设置在安装板112上远离圆柱体111的一侧。可以理解的是，安装部11亦可采用其它的结构，如安装部11可采用长方体或正方体等结构。
开口槽12的底部设置有用于供气体流通的第一通孔13。该实施例中，第一通孔13为圆形孔，其与固定部21相连通。可以理解的是，固定部21中设置有与第一通孔13相连通的结构，以使第一通孔13中的气体能够流通至固定部21中。当所述压力表用于测量压力容器中的压力时，
压力容器中的气体依次通过第一通孔13、固定部21进入弹簧管2中，弹簧管2产生向内收缩或向外扩张运动，此时，弹簧管2通过指针轴3带动指针4转动，从而可以指示出
压力容器中的压力数值。所述压力表采用如上所述的结构，其结构较为简单且成本较低。
如图8所示，本实施例中，指示面板5上设置有刻度标识52，用于指示压力数值。刻度标识52上设置有高精度指示区53，该高精度指示区53为所述压力表误差最小、精度最高的区域。当指针4转动至该高精度指示区53时，表明所述压力表测量的压力值误差最小。该高精度指示区53根据选用的弹簧管2的特性（如厚度、体积等）进行设定，可以理解的是，选用的弹簧管2不同，高精度指示区53的数值范围亦不同。所述压力表可对某一个压力点进行较高精度的测量。采用上述结构，简化了所述压力表的制造工艺，从而降低了所述压力表的生产成本。
具体地，如图3所示，本实施例中，所述压力表还包括连接管22。连接管22呈L形，其一端与固定部21相连通，另一端与第一通孔13相连通。可以理解的，连接管22并不局限于L形的结构，其亦可采用其它的结构，例如长条形，只需能够实现第一通孔13与固定部21之间的连通即可。
如图1所示，指示面板5上安装有两个限位件51。限位件51大致为圆杆结构，两个限位件51分别设置在指示面板5中刻度标识52的两侧，用于限制指针4的转动范围。该实施例中，限位件51可采用螺纹连接件或销钉的结构。指示面板5通过第一螺纹件9固定安装在安装部11上。该实施例中，第一螺纹件9设置有两个，两个第一螺纹件9均匀布置并穿过指示面板5固定连接在安装部11的顶端。请参阅图1所示，所述压力表还包括透明表盖7、表壳8以及第二螺纹件10。底座1、弹簧管2、指针轴3、指针4以及指示面板5均设置在该表壳8的内部。透明表盖7安装在表壳8的顶部，从而将上述结构密闭地设置在透明表盖7与表壳8形成的空间内。第二螺纹件10穿过表壳8并与底座1的底部连接，从而使表壳8固定安装在底座1上。该实施例中，第二螺纹件10也设置有两个，两个第二螺纹件10均匀布置在表壳8上。可以理解的是，第一螺纹件9、第二螺纹件10的数量亦可以有其它的选择。
如图1、图7所示，本实施例中，所述压力表还包括拉杆6。拉杆6的一端与弹簧管2上远离固定部21的一端连接，拉杆6的另一端与指针轴3连接。
进一步地，拉杆6的两端分别设置有弯钩部61。两个弯钩部61分别与弹簧管2、指针轴3连接。
进一步地，请参阅图3所示，弹簧管2上远离所述固定部21的一端设置有连接片23。连接片23大致为圆形的片状结构，其上设置有第一连接孔24。请参阅图6所示，指针轴3的外圆周面上设置有环形凸台31，该环形凸台31与指针轴3同轴。环形凸台31上设置有第二连接孔32。两个弯钩部61分别相应地卡接在第一连接孔24与第二连接孔32中，以使拉杆6连接在弹簧管2与指针轴3之间。
如图5所示，本实施例中，底座1的底端中心位置处设置有螺纹连接件14。该螺纹连接件14为外螺纹连接件，通过该螺纹连接件14可以将所述压力表安装在压力容器上。螺纹连接件14上设置第二通孔15。第二通孔15为圆形孔，其与第一通孔13相连通。该实施例中，第二通孔15分别与螺纹连接件14、第一通孔13同轴。当所述压力表用于测量压力容器中的压力时，
压力容器中的气体依次通过第二通孔15、第一通孔13、固定部21进入弹簧管2中，以使弹簧管2产生向内收缩或向外扩张运动。
上面结合附图对本实用新型的实施例进行了描述，但是本实用新型并不局限于上述的具体实施方式，上述的具体实施方式仅仅是示意性的，而不是限制性的，本领域的普通技术人员在本实用新型的启示下，在不脱离本实用新型宗旨和权利要求所保护的范围情况下，还可做出很多形式，这些均属于本实用新型的保护之内。
Claims (10)
- 一种压力表，包括底座（1）、设置在所述底座（1）上并呈C形的弹簧管（2）、可转动地安装在所述底座（1）上的指针轴（3）、固定连接在所述指针轴（3）上的指针（4）以及指示面板（5）；所述弹簧管（2）与所述指针轴（3）连接、并可带动所述指针轴（3）转动；其特征在于：所述弹簧管（2）的一端设置有向所述底座（1）中心弯折并与所述弹簧管（2）相连通的固定部（21）；所述底座（1）上与所述弹簧管（2）相邻的端面设置有呈凸起状的安装部（11），所述安装部（11）上设置有与所述固定部（21）相适配的开口槽（12）；所述固定部（21）安装在所述开口槽（12）中；所述开口槽（12）的底部设置有用于供气体流通的第一通孔（13），所述第一通孔（13）与所述固定部（21）相连通。
- 根据权利要求1所述的压力表，其特征在于，所述安装部（11）包括设置于所述底座（1）的中心位置处的圆柱体（111）以及由所述圆柱体（111）的外圆周面延伸出的安装板（112）；所述开口槽（12）由所述圆柱体（111）的中心位置向所述安装板（112）延伸，且所述开口槽（12）的开口设置在所述安装板（112）上远离所述圆柱体（111）的一侧。
- 根据权利要求1所述的压力表，其特征在于，所述压力表还包括连接管（22）；所述连接管（22）的一端与所述固定部（21）相连通，另一端与所述第一通孔（13）相连通。
- 根据权利要求1所述的 压力表，其特征在于，所述指示面板（5）通过第一螺纹件（9）固定安装在所述安装部（11）上。
- 根据权利要求1所述的 压力表，其特征在于，所述压力表还包括透明表盖（7）以及表壳（8）；所述底座（1）、所述弹簧管（2）、所述指针轴（3）、所述指针（4）以及所述指示面板（5）均设置在所述表壳（8）内部；所述透明表盖（7）安装在所述表壳（8）的顶部。
- 根据权利要求1所述的 压力表，其特征在于，所述压力表还包括拉杆（6）；所述拉杆（6）的一端与所述弹簧管（2）上远离所述固定部（21）的一端连接，所述拉杆（6）的另一端与所述指针轴（3）连接。
- 根据权利要求6所述的 压力表，其特征在于，所述拉杆（6）的两端分别设置有弯钩部（61）；两个所述弯钩部（61）相向弯折；所述弹簧管（2）上远离所述固定部（21）的一端设置有连接片（23）；所述连接片（23）上设置有第一连接孔（24）；所述指针轴（3）的外圆周面上设置有与所述指针轴（3）同轴的环形凸台（31）；所述环形凸台（31）上设置有第二连接孔（32）；两个所述弯钩部（61）分别相应地卡接在所述第一连接孔（24）与所述第二连接孔（32）中。
- 根据权利要求1所述的 压力表，其特征在于，所述底座（1）的底端中心位置处设置有用于将所述压力表安装在压力容器上的螺纹连接件（14）；所述螺纹连接件（14）上设置第二通孔（15）；所述第二通孔（15）与所述第一通孔（13）相连通。
- 根据权利要求1所述的 压力表，其特征在于，所述指示面板（5）上安装有两个用于限制所述指针（4）的转动范围的限位件（51）。
- 根据权利要求1所述的 压力表，其特征在于，所述指示面板（5）上设置有刻度标识（52）；所述刻度标识（52）上设置有高精度指示区（53）。
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