Ship pressure gauge

Abstract

The invention provides a pressure gauge for a ship, which comprises a gauge body and a protective shell, and is characterized in that the gauge body is located in the protective shell; the meter body comprises a meter head, a supporting piece and a connecting hose, the meter head is connected with a first connector, the lower portion of the first connector is connected with the supporting piece, the lower portion of the supporting piece is connected with a second connector, and the two ends of the connecting hose are communicated with the first connector and the second connector respectively; a first protection cavity and a second protection cavity are formed in the protection shell, the meter head is located in the first protection cavity, and the supporting piece and the connecting hose are located in the second protection cavity; a plurality of buffer plates are arranged in the first protection cavity, buffer pieces are arranged between the buffer plates and the protection shell, the multiple buffer plates are spaced by a preset distance, and the adjacent buffer plates are connected through elastic pieces; the pressure gauge for the ship is shock-resistant and corrosion-resistant, and can transmit more stable pressure data.

Description

Technical Field

[0001] The present invention relates to ship equipment, in particular to a pressure gauge for ships. Background Art

[0002] The pressure gauge uses the elastic deformation of the sensitive element (such as a bellows) inside the gauge, and then the conversion mechanism in the gauge movement transmits the pressure deformation to the pointer, causing the pointer to rotate to display the pressure. Pressure gauges are generally most widely used in industrial production, and are used to measure and indicate pressures higher than the ambient pressure. On ships, pressure gauges are also widely used. Currently, ships have been developing in the direction of automation, which requires pressure gauges to have remote transmission functions. In the existing technology, the pressure value is generally converted into an electrical signal through the technology of sliding resistors to achieve the remote transmission function. However, pressure gauges with remote transmission functions are not stable enough and are afraid of vibration and corrosion. Since ships are subject to greater turbulence and corrosion from seawater during navigation, pressure gauges on ships need to meet higher standards.

[0003] The invention patent with application number 202011633796.6 and invention name "A shock-absorbing device for a pressure gauge for ships" discloses a pressure gauge anti-seismic device, which includes a frame, a pressure gauge is arranged in the frame, a shock-absorbing mechanism is arranged in the frame, the shock-absorbing mechanism includes a buffer spring and a shock-absorbing frame, a buffer pad is fixedly connected to the shock-absorbing frame, a support is provided on the shock-absorbing frame, and a protective mechanism is provided on the pressure gauge, the protective mechanism includes a buffer plate, a fixed plate is provided on the top of the pressure gauge, and a spring is fixedly connected to the fixed plate, thereby playing a role of buffering protection, but its anti-corrosion effect is not good.

[0004] In existing technology, corrosion-resistant pressure gauges are a new type of gauge developed based on the advanced technology of stainless steel pressure gauges. They have strong resistance to environmental corrosion and are suitable for use on ships in hot, humid environments and those exposed to salt spray. However, their seismic performance is not ideal.

[0005] In addition, when a ship encounters strong winds and waves during navigation, the wind and waves hitting the pressure gauge on the deck will not only affect the accuracy of the data transmitted by the pressure gauge, but may also break the pressure gauge, causing leakage problems.

[0006] Therefore, there is a need for a pressure gauge that is resistant to shock and corrosion. Summary of the Invention

[0007] Based on this, it is necessary to provide a shock-resistant and corrosion-resistant ship pressure gauge.

[0008] The present invention provides a pressure gauge for ships, comprising a gauge body and a protective shell, wherein the gauge body is located in the protective shell;

[0009] The meter body includes a meter head, a support member, and a connecting hose. The meter head is connected to a first connecting head, the lower portion of the first connecting head is connected to the support member, the lower portion of the support member is connected to a second connecting head, and both ends of the connecting hose are connected to the first connecting head and the second connecting head respectively.

[0010] A first protective cavity and a second protective cavity are provided in the protective shell, the meter head is located in the first protective cavity, and the support member and the connecting hose are located in the second protective cavity;

[0011] A plurality of buffer plates are provided in the first protection cavity, a buffer member is provided between the buffer plate and the protection shell, a preset distance is spaced between the plurality of buffer plates, and adjacent buffer plates are connected by elastic members.

[0012] Preferably, a first support plate and a second support plate are provided in the second protective cavity, the first connecting head is located at the upper part of the first support plate, the second connecting head is located at the lower part of the second support plate, the upper end of the support member passes through the first support plate and is fixedly connected to the first connecting head, and the lower end of the support member passes through the second support plate and is fixedly connected to the second connecting head.

[0013] Preferably, a first positioning groove is provided on the inner wall of the protective shell, the first support plate is inserted into the first positioning groove, and the first support plate can rock in the first positioning groove; a second positioning groove is also provided on the inner wall of the protective shell, the second support plate is inserted into the second positioning groove, and the second support plate can rock in the second positioning groove.

[0014] Preferably, a first buffer spring is provided between the first support plate and the second support plate, and the support member passes through the first buffer spring.

[0015] Preferably, the buffer member is a spring, at least two springs are provided between each buffer member and the protective shell, and the elastic member is an elastic metal sheet;

[0016] The support member is a solid metal rod, the lower end of the first connector is sealed, the upper end of the second connector is sealed, and both the first connector and the second connector are threadedly connected to the support member; or,

[0017] The supporting member is a spring member.

[0018] Preferably, the lower portion of the protective shell is detachably connected to a connecting fixture.

[0019] Preferably, the protective shell includes a fixed part, a connecting part and a movable part, the lower part of the movable part is fixedly connected to the connecting part, the connecting part is movably connected to the fixed part, the outer surface of the movable part is a smooth curved surface, and the watch head is located inside the movable part.

[0020] Preferably, the movable portion includes a spherical segment-shaped metal shell and a convex transparent cover, the transparent cover is fixed on the metal shell, and the dial of the watch head faces the transparent cover.

[0021] Preferably, a sliding groove is provided on the outer surface of the fixing portion, and a sliding block is provided on the inner surface of the connecting portion. The sliding block is slidably connected to the sliding groove. At least two second buffer springs are also provided in the sliding groove. The two second buffer springs are respectively located on both sides of the sliding block, and one end of the second buffer spring is connected to the sliding block, and the other end is connected to the side wall of the sliding groove.

[0022] Preferably, the fixing portion is inserted into the interior of the connecting portion, and the lower end of the outer surface of the connecting portion is provided with an inclined waterproof slope, and the waterproof slope gradually shrinks from top to bottom.

[0023] The pressure gauge for ships of the present invention is provided with a protective shell, and a first protective cavity and a second protective cavity are provided in the protective shell. A plurality of buffer plates are provided in the first protective cavity, and a buffer member is provided between the buffer plate and the protective shell. When the protective shell shakes relative to the gauge head, the buffer plate and the buffer member can play a buffering role. Adjacent buffer plates are connected by elastic members. When the protective shell tilts in one direction under the action of external force, the corresponding buffer plate plays a buffering role. The elastic member applies a pulling force to the buffer plate, and the buffering effect is better. Since a first connector and a second connector are provided and the first connector and the second connector are connected by a connecting hose, vibration will not affect the sealing effect of the pressure gauge, and the connecting hose can buffer the impact force of the liquid or gas therein, so that the stability of the pressure value is better.

[0024] Since the first support plate and the second support plate are arranged in the second buffer cavity, they play a supporting role for the support member;

[0025] Since the first support plate is movably connected to the first positioning groove, the second support plate is movably connected to the second positioning groove, and a spring is sleeved on the support member, when the protective cover is slightly shaken by an impact, the impact force on the pressure gauge will be very small;

[0026] Since the protective shell includes a fixed portion, a connecting portion and a movable portion, and the movable portion is movable relative to the fixed portion, when an impact force hits the movable portion, the movable portion can move with the impact force to play a buffering role;

[0027] Since the movable part includes a spherical metal shell and a convex transparent cover, the impact force can be effectively reduced;

[0028] The metal shell can be regularly maintained by knocking off rust and spraying an anti-corrosion surface, which can effectively prevent rust, and the maintenance process will not affect the use of the pressure gauge. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and other purposes, features and advantages of the present invention will become more apparent by describing in more detail the preferred embodiments of the present invention shown in the accompanying drawings. The same reference numerals indicate the same parts throughout the accompanying drawings, and the drawings are not intentionally scaled to actual size, but rather are intended to illustrate the subject matter of the present invention.

[0030] Figure 1 This is an overall structural diagram of the ship pressure gauge of the present invention;

[0031] Figure 2 It is a diagram of the internal structure of the pressure gauge of the present invention;

[0032] Figure 3 for Figure 2 Enlarged view of part A;

[0033] Figure 4 for Figure 2 Enlarged view of part B;

[0034] Figure 5-1 and Figure 5-2 This is an exploded view of the first connector, the second connector, and the support member;

[0035] Figure 6 This is an overall structural diagram of a pressure gauge according to another embodiment of the present invention;

[0036] Figure 7 for Figure 6 Transverse section of

[0037] Figure 8 for Figure 6 Longitudinal section of .

[0038] In the figure: 1. meter head; 2. support member; 21. first buffer spring; 3. connecting hose; 4. first connector; 5. second connector; 6. protective shell; 61. first protective cavity; 62. second protective cavity; 63. fixing part; 631. sliding groove; 632. second buffer spring; 633. annular groove; 64. connecting part; 641. sliding block; 642. annular protrusion; 65. movable part; 651. metal shell; 652. transparent cover; 66. first positioning groove; 67. second positioning groove; 71. first support plate; 72. second support plate; 8. buffer plate; 81. buffer member; 82. elastic member; 9. connecting fixing member. DETAILED DESCRIPTION

[0039] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings.

[0040] It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to the other element and integrated therewith, or there may be an intermediate element. The terms "mounted", "one end", "the other end" and similar expressions used herein are for illustrative purposes only.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one skilled in the art to which this invention pertains. The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0042] refer to Figure 1-8 The present invention provides a pressure gauge for ships, comprising a gauge body and a protective shell 6, wherein the gauge body is located in the protective shell 6. Figure 2 The meter body includes a meter head 1, a support member 2 and a connecting hose 3. A first connecting head 4 is connected to the meter head 1. The lower part of the first connecting head 4 is connected to the support member 2. The lower part of the support member 2 is connected to the second connecting head 5. The two ends of the connecting hose 3 are respectively connected to the first connecting head 4 and the second connecting head 5. Specifically, one end of the first connecting head 4 connected to the support member 2 is isolated from the other end, and one end of the second connecting head 5 connected to the support member 2 is also isolated from the other end. The setting of the connecting hose 3 ensures that the vibration of the meter head 1 and the support member 2 will not affect the sealing effect of the pressure gauge, and the connecting hose 3 can buffer the impact force of the liquid or gas inside it, so that the pressure value is more stable. A first protective cavity 61 and a second protective cavity 62 are provided in the protective shell 6. The meter head 1 is located in the first protective cavity 61, and the support member 2 and the connecting hose 3 are located in the second protective cavity 62. Specifically, the shape of the protective shell 6 is adapted to the shape of the pressure gauge, and the protective shell 6 adopts a metal shell 651. Reference Figure 2 and Figure 3 Multiple buffer plates 8 are installed within the first protective cavity 61. A buffer member 81 is provided between the buffer plates 8 and the protective shell 6. When the protective shell 6 shakes relative to the meter head 1 and the protective shell 6 contacts the meter head 1, the buffer plates 8 and buffer member 81 can provide a buffering effect. The multiple buffer plates 8 are spaced apart by a preset distance, and adjacent buffer plates 8 are connected by elastic members 82. When the protective shell 6 tilts in one direction under the action of an external force, the corresponding buffer plates 8 act as buffers. The elastic members 82 apply a tensile force to the buffer plates 8, further enhancing the buffering effect.

[0043] The ship's remote pressure gauge generally moves the sliding contact of the sliding rheostat through the displacement of the free end of the spring tube through the transmission mechanism. The sliding rheostat is connected to the electrical circuit of the pressure gauge. As the contact moves, the resistance value of the sliding rheostat changes, and the mechanical displacement signal is converted into a resistance signal. It is further transmitted to the display instrument or control system through transmission methods such as cables. The display instrument displays the value of the measured pressure in the form of numbers or pointers based on the received resistance signal after corresponding conversion and processing, thereby realizing remote measurement and display of pressure. In this application, since the principle of the remote pressure gauge is a prior art and is not an improvement point of this application, its pressure conversion and transmission structure will no longer be described in detail.

[0044] refer to Figure 2 and Figure 4 In a preferred embodiment, a first support plate 71 and a second support plate 72 are disposed within the second protective cavity 62. The first connector 4 is located above the first support plate 71, and the second connector 5 is located below the second support plate 72. The upper end of the support member 2 passes through the first support plate 71 and is fixedly connected to the first connector 4. The lower end of the support member 2 passes through the second support plate 72 and is fixedly connected to the second connector 5. Specifically, the diameters of the first connector 4 and the second connector 5 are larger than the diameter of the support member 2, so that the support member 2 is clamped between the first support plate 71 and the second support plate 72.

[0045] refer to Figure 2 and Figure 4 In a further preferred embodiment, a first positioning slot 66 is provided on the inner wall of the protective case 6, into which a first support plate 71 is inserted and can swing. A second positioning slot 67 is also provided on the inner wall of the protective case 6, into which a second support plate 72 is inserted and can swing. The first and second support plates 71 and 72 connect the protective case 6 and the meter body as a whole, positioning the meter body within the protective case 6, maintaining an appropriate gap between the meter head 1 and the buffer plate 8, and when the protective case 6 swings relative to the support member 2, the movable connection structure of the first and second support plates 71 and 72 can minimize the impact on the pressure gauge.

[0046] refer to Figure 2 and Figure 4In a further preferred embodiment, a first buffer spring 21 is disposed between the first support plate 71 and the second support plate 72, and the support member 2 extends through the first buffer spring 21. This further reduces the impact of shaking of the protective case 6 on the pressure gauge. Furthermore, the first buffer spring 21 is relatively hard, and even small external forces will not cause it to compress and deform. This ensures that the first and second support plates 71 and 72 maintain the correct position of the gauge body, and also provides a buffering effect when the protective case 6 is subjected to excessive impact.

[0047] refer to Figure 2 and Figure 3 In a preferred embodiment, the buffer 81 is a spring, and at least two springs are provided between each buffer 81 and the protective shell 6, and the two springs are respectively located at both ends of the buffer 81. The elastic member 82 is an elastic metal sheet. Of course, the elastic member 82 can also be other elastic structures, such as a spring, an elastic band, etc. Figure 5-1 , the support member 2 is a solid metal rod, which ensures the hardness of the support member 2, making its supporting effect stronger, and a small external force will not cause it to shake. The lower end of the first connector 4 is in a sealed state, and the upper end of the second connector 5 is in a sealed state. The first elastic member 82, the second elastic member 82 and the sensitive element (such as a bellows) inside the pressure gauge are connected. The first connector 4 and the second connector 5 are both fixed to the support member 2 by threaded connection. Of course, it can also be welded or clamped connection, etc. In this embodiment, threaded connection is preferred. The pressure gauge of this embodiment is generally used on the deck of a ship.

[0048] refer to Figure 5-2 In another embodiment, the support member 2 is a spring member, which changes the traditional rigid connection structure. In this way, the gauge head 1 is separated from the rigid connection with the pipeline below. When the pipeline vibrates, the spring member will absorb most of the vibration, reducing the vibration of the gauge head 1. Specifically, the spring member includes a spring body and two threaded connectors. The two threaded connectors are fixedly connected to the two ends of the spring body and are used to connect to the first connector 4 and the second connector 5. That is, the two ends of the spring member are provided with threaded connectors, and the two threaded connectors are respectively used to connect and fix to the first connector and the second connector. The pressure gauge of this embodiment is generally used in locations in the cabin where pipeline vibration is frequent.

[0049] refer to Figure 1 and Figure 6 In a preferred embodiment, the lower part of the protective shell 6 is detachably connected to a connecting fixture 9, which can be a connecting sleeve, a locking ring, a fixing plate, etc. The connecting fixture 9 can be replaced according to the environment, and the second connecting head 5 passes through the connecting fixture 9.

[0050] refer to Figure 6In a preferred embodiment, the protective housing 6 includes a fixed portion 63, a connecting portion 64, and a movable portion 65. The lower portion of the movable portion 65 is fixedly connected to the connecting portion 64. Specifically, the lower portion of the movable portion 65 and the connecting portion 64 are welded together, resulting in a stable structure and effective sealing. The connecting portion 64 is movably connected to the fixed portion 63. The outer surface of the movable portion 65 is a smooth curved surface, and the meter head 1 is located within the movable portion 65. In a further embodiment, the movable portion 65 includes a spherical metal shell 651 and a convex transparent cover 652. The transparent cover 652 is fixed to the metal shell 651, with the dial of the meter head 1 facing the transparent cover 652. Specifically, the transparent cover 652 includes a transparent light-transmitting member and a threaded member. The light-transmitting member is fixed to the threaded member, and the transparent cover 652 is fixedly connected to the metal shell 651 via the threaded member. In this embodiment, the first support plate 71 and the second support plate 72 are circular, and the support member 2 and the connecting hose 3 pass through the center holes of the first support plate 71 and the second support plate 72.

[0051] refer to Figure 6-8 In a preferred embodiment, a sliding groove 631 is provided on the outer surface of the fixed portion 63, and a sliding block 641 is provided on the inner surface of the connecting portion 64. The sliding block 641 is slidably connected to the sliding groove 631. At least two second buffer springs 632 are also provided in the sliding groove 631. The two second buffer springs 632 are located on either side of the sliding block 641, with one end of the second buffer spring 632 connected to the sliding block 641 and the other end connected to the side wall of the sliding groove 631. When the pressure gauge is impacted by strong winds or waves, the movable portion 65 is larger in size and is subjected to the greatest impact force. When the impact force exceeds the bearing capacity of the protective shell 6, the protective shell 6 will break. The movable portion 65 of the present invention can move relative to the fixed portion 63. When the impact is too strong, the movable portion 65 rotates to buffer some of the impact force, ensuring its stability. When the impact force disappears, the movable portion 65 automatically resets under the action of the second buffer spring 632.

[0052] refer to Figure 6-8 In a further embodiment, the connection portion 64 and the fixed portion 63 are sealed to prevent seawater from entering the protective shell 6 when impacted by waves. The movable portion 65 is provided with an annular groove 633, and the connection portion 64 is provided with an annular protrusion 642. The annular protrusion 642 is retained in the annular groove 633, thereby fixing the connection portion 64 and the fixed portion 63 together.

[0053] refer to Figure 6-8 In a preferred embodiment, the fixing portion 63 is inserted into the interior of the connecting portion 64, and the lower end of the outer surface of the connecting portion 64 is provided with an inclined waterproof slope. The waterproof slope gradually shrinks from top to bottom, shrinking the lower surface of the connecting portion 64, which can effectively reduce the amount of seawater entering between the connecting portion 64 and the fixing portion 63.

[0054] The ship pressure gauge of the present invention is provided with a protective shell 6, and a first protective cavity 61 and a second protective cavity 62 are provided in the protective shell 6. A plurality of buffer plates 8 are provided in the first protective cavity 61, and a buffer member 81 is provided between the buffer plate 8 and the protective shell 6. When the gauge head 1 shakes, the buffer plate 8 and the buffer member 81 can play a buffering role. Adjacent buffer plates 8 are connected by elastic members 82. When the protective cover tilts in one direction under the action of external force, the corresponding buffer plate 8 plays a buffering role. The elastic member 82 gives the buffer plate 8 a pulling force, and the buffering effect is better. Since the first connector 4 and the second connector 5 are provided and the first connector 4 and the second connector 5 are connected through the connecting hose 3, vibration will not affect the sealing effect of the pressure gauge, and the connecting hose 3 can buffer the impact force of the liquid or gas inside it, so that the stability of the pressure value is better.

[0055] Since the first support plate 71 and the second support plate 72 are provided in the second buffer cavity, they play a supporting role for the support member 2;

[0056] Since the first support plate 71 is movably connected to the first positioning groove 66, the second support plate 72 is movably connected to the second positioning groove 67, and a spring is sleeved on the support member 2, when the protective cover is slightly shaken by an impact, the impact force on the pressure gauge will be very small;

[0057] Since the protective shell 6 includes a fixed portion 63, a connecting portion 64 and a movable portion 65, and the movable portion 65 is movable relative to the fixed portion 63, when an impact force hits the movable portion 65, the movable portion 65 can move with the impact force to play a buffering role;

[0058] Since the movable portion 65 includes a spherical metal shell 651 and a convex transparent cover 652, the impact force can be effectively reduced;

[0059] The metal shell 651 can be regularly maintained by knocking off rust and spraying an anti-corrosion surface layer, which can effectively prevent rust, and the maintenance process will not affect the use of the pressure gauge.

[0060] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0061] The above embodiments merely represent specific implementation methods of the invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be based on the appended claims.

Claims

1. A pressure gauge for a ship, characterized in that: It comprises a watch body and a protective shell (6), wherein the watch body is located in the protective shell (6); The meter body comprises a meter head (1), a support member (2) and a connecting hose (3); the meter head (1) is connected to a first connecting head (4); the lower part of the first connecting head (4) is connected to the support member (2); the lower part of the support member (2) is connected to a second connecting head (5); and the two ends of the connecting hose (3) are respectively connected to the first connecting head (4) and the second connecting head (5); A first protective cavity (61) and a second protective cavity (62) are provided in the protective shell (6); the meter head (1) is located in the first protective cavity (61); and the support member (2) and the connecting hose (3) are located in the second protective cavity (62); A plurality of buffer plates (8) are provided in the first protective cavity (61), a buffer member (81) is provided between the buffer plate (8) and the protective shell (6), a preset distance is spaced between the plurality of buffer plates (8), and adjacent buffer plates (8) are connected via an elastic member (82).

2. The pressure gauge for a ship according to claim 1, wherein: A first support plate (71) and a second support plate (72) are provided in the second protective cavity (62); the first connecting head (4) is located at the upper part of the first supporting plate (71); the second connecting head (5) is located at the lower part of the second supporting plate (72); the upper end of the support member (2) passes through the first supporting plate (71) and is fixedly connected to the first connecting head (4); the lower end of the support member (2) passes through the second supporting plate (72) and is fixedly connected to the second connecting head (5).

3. The pressure gauge for a ship according to claim 2, wherein: A first positioning groove (66) is provided on the inner wall of the protective shell (6), the first support plate (71) is inserted into the first positioning groove (66), and the first support plate (71) can rock in the first positioning groove (66); a second positioning groove (67) is also provided on the inner wall of the protective shell (6), the second support plate (72) is inserted into the second positioning groove (67), and the second support plate (72) can rock in the second positioning groove (67).

4. The pressure gauge for a ship according to claim 3, wherein: A first buffer spring (21) is provided between the first support plate (71) and the second support plate (72), and the support member (2) passes through the first buffer spring (21).

5. The pressure gauge for a ship according to claim 1, wherein: The buffer member (81) is a spring, at least two springs are provided between each buffer member (81) and the protective shell (6), and the elastic member (82) is an elastic metal sheet; The support member (2) is a solid metal rod, the lower end of the first connector (4) is in a sealed state, the upper end of the second connector (5) is in a sealed state, and the first connector (4) and the second connector (5) are both threadedly connected to the support member (2); or, The supporting member is a spring member.

6. The pressure gauge for a ship according to claim 1, wherein: The lower portion of the protective shell (6) is detachably connected to a connecting fixture (9).

7. The pressure gauge for a ship according to claim 1, wherein: The protective shell (6) comprises a fixed portion (63), a connecting portion (64) and a movable portion (65); the lower portion of the movable portion (65) is fixedly connected to the connecting portion (64); the connecting portion (64) is movably connected to the fixed portion (63); the outer surface of the movable portion (65) is a smooth curved surface; and the meter head (1) is located inside the movable portion (65).

8. The pressure gauge for a ship according to claim 7, characterized in that: The movable portion (65) comprises a spherical metal shell (651) and a convex transparent cover (652). The transparent cover (652) is fixed on the metal shell (651), and the dial of the meter head (1) faces the transparent cover (652).

9. The pressure gauge for a ship according to claim 7, wherein: The outer surface of the fixing portion (63) is provided with a sliding groove (631), and the inner surface of the connecting portion (64) is provided with a sliding block (641), and the sliding block (641) is slidably connected to the sliding groove (631). At least two second buffer springs (632) are also provided in the sliding groove (631), and the two second buffer springs (632) are respectively located on both sides of the sliding block (641), and one end of the second buffer spring (632) is connected to the sliding block (641), and the other end is connected to the side wall of the sliding groove (631).

10. The pressure gauge for a ship according to claim 7, wherein: The fixing portion (63) is inserted into the interior of the connecting portion (64), and the lower end of the outer surface of the connecting portion (64) is provided with an inclined waterproof slope, and the waterproof slope gradually shrinks from top to bottom.

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