Pressure gauge capable of preventing pressure guide pipe from being blocked

Abstract

The invention relates to the technical field of instrument engineering, and discloses a pressure gauge capable of preventing a pressure guide pipe from being blocked, which comprises a pressure gauge body, a pressure transmitter is arranged on the right side of the pressure gauge body, a left side pressure tapping pipe and a right side pressure tapping pipe are arranged at the bottoms of the pressure gauge body and the pressure transmitter, and a liquid inlet pipe is mounted on the left side of the left side pressure tapping pipe. And a pore plate is mounted between the left side pressure tapping pipe and the right side pressure tapping pipe. The dredging hole in the adjusting plug corresponds to the vertical hole, a medium in the pressure inlet pipe enters the vertical hole, then enters the dredging hole and is discharged into the right side pressure taking pipe through the dredging pipe, so that the medium flows back into the pipeline again, the waste of the medium is reduced, meanwhile, the flowing medium can circularly flush the pressure inlet pipe and the dredging pipe, and the working efficiency is improved. Therefore, the inner walls of the pressure inlet pipe and the dredging pipe cannot be blocked due to accumulation of impurities in the medium, and the problem that the accuracy of pressure measurement and the production safety are affected due to blockage of the pressure guide pipe of the pressure gauge is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of instrument engineering, in particular to a pressure gauge capable of preventing the blockage of a pressure guide pipe. BACKGROUND

[0002] The pressure gauge refers to a gauge using an elastic element as a sensitive element to measure and indicate pressure higher than the ambient pressure, which is widely used and can be found almost everywhere in industrial processes and scientific research fields, such as heat pipe networks, oil and gas transmission, water and gas supply systems, vehicle maintenance and repair shops, etc. In particular, in industrial process control and technical measurement processes, the elastic sensitive element of the mechanical pressure gauge has high mechanical strength and is easy to produce, so the mechanical pressure gauge is more and more widely used.

[0003] The pressure guide pipe is installed on the pressure gauge, and is a kind of pipe directly contacting with the process medium. It is the most commonly used, most demanding and most complex pipe for instrument installation and use. The medium transported by the pressure guide pipe contains impurities, which will be deposited in the pipe for a long time, causing the pressure gauge to be blocked. The blockage of the pressure guide pipe of the pressure gauge will directly affect the accuracy of pressure measurement, and even cause the instrument to fail, thereby affecting the production safety and process control. SUMMARY

[0004] The present application provides a pressure gauge capable of preventing the blockage of a pressure guide pipe, which solves the problems in the background art.

[0005] The present application provides the following technical scheme: a pressure gauge capable of preventing the blockage of a pressure guide pipe, comprising a pressure gauge body, a pressure transmitter is arranged on the right side of the pressure gauge body, a left side pressure taking pipe and a right side pressure taking pipe are arranged on the bottom of the pressure gauge body and the pressure transmitter, a liquid inlet pipe is arranged on the left side of the left side pressure taking pipe, a liquid outlet pipe is arranged on the right side of the right side pressure taking pipe, a hole plate is arranged between the left side pressure taking pipe and the right side pressure taking pipe, a left side pressure taking hole is arranged on the outer wall of the left side pressure taking pipe, a right side pressure taking hole and a backflow hole are arranged on the outer wall of the right side pressure taking pipe, a left side medium connecting pipe and a right side medium connecting pipe are arranged on the inner wall of the left side pressure taking hole and the right side pressure taking hole, and the left side medium connecting pipe and the right side medium connecting pipe are arranged on the pressure transmitter. The pressure gauge body comprises a top shell, a bottom shell is arranged on the bottom of the top shell, a diaphragm is arranged between the bottom shell and the top shell, an adjusting shell penetrates the inner cavity of the bottom shell, a vertical hole is arranged in the inner cavity of the adjusting shell and the bottom shell, an adjusting plug is slidably connected in the vertical hole, a pressure measuring hole is arranged in the middle of the adjusting plug, and a dredging hole is arranged on the right side of the pressure measuring hole.

[0006] As a preferred technical scheme of the present application, the left side of the adjusting plug is provided with a connecting rod, the connecting rod is fixed on the adjusting plug through a connecting disc, one end of the connecting rod away from the adjusting plug is fixedly provided with a threaded rod, the outer edge of the threaded rod is fixedly provided with a worm wheel, the outer edge of the worm wheel is threadedly connected with a worm, and the outer edge of the worm is fixedly sleeved with an adjusting disc.

[0007] As a preferred technical scheme of the present application, the connecting disc is in sliding connection with the adjusting shell, the outer edge of the connecting disc is fixedly provided with a limiting block, the inner wall of the adjusting shell is provided with a limiting groove, and the limiting block is in sliding connection with the limiting groove.

[0008] As a preferred technical scheme of the present application, the outer edge of the connecting rod is in sliding connection with a shaft sealing ring, the outer wall of the shaft sealing ring is fixedly provided with a fixed cover, the fixed cover is installed on the adjusting shell, and a sealing gasket is arranged between the fixed cover and the adjusting shell.

[0009] As a preferred technical scheme of the present application, the outer wall of the adjusting shell is installed with a protective shell, the worm wheel is movably connected on the protective shell, the worm is movably connected on the protective shell, and the outer edge of the protective shell is installed with a protective cover.

[0010] As a preferred technical scheme of the present application, the two ends of the adjusting plug are both provided with ring grooves, the inner wall of the ring groove is installed with a piston sealing ring, and the piston sealing ring is in sliding connection with the adjusting shell.

[0011] As a preferred technical scheme of the present application, the pressure measuring hole penetrates through the adjusting plug, the water inlet of the dredging hole is located below the adjusting plug, and the water outlet of the dredging hole is located on the right side of the adjusting plug.

[0012] As a preferred technical scheme of the present application, the outer edge of the adjusting disc is provided with pressure grooves, dredging grooves and plugging grooves, and the pressure grooves, the dredging grooves and the plugging grooves are uniformly distributed on the adjusting disc.

[0013] As a preferred technical scheme of the present application, the top of the protective shell is installed with an observation shell, the outer wall of the observation shell is provided with an observation groove, and the adjusting disc rotates in the inner cavity of the observation shell.

[0014] As a preferred technical scheme of the present application, the inner wall of the bottom of the bottom shell is installed with a pressure inlet pipe, the inner wall of the end of the adjusting shell away from the protective shell is installed with a dredging pipe, one end of the dredging pipe away from the adjusting shell is fixedly sleeved in the backflow hole, and the pressure inlet pipe penetrates through the liquid inlet pipe.

[0015] The present application has the following beneficial effects: 1. This pressure gauge with anti-blockage pressure guide tube works by aligning the unblocking hole on the adjusting plug with the vertical hole. The medium in the pressure inlet tube enters the vertical hole, then the unblocking hole, and finally flows into the pressure tapping tube on the right side through the unblocking tube, allowing the medium to flow back into the pipeline, reducing medium waste. At the same time, the flowing medium can circulate and flush the pressure inlet tube and the unblocking tube, preventing the inner walls of the pressure inlet tube and the unblocking tube from being blocked by the accumulation of impurities in the medium. This solves the problem of pressure measurement accuracy and production safety being affected by the blockage of the pressure gauge's pressure guide tube.

[0016] 2. This pressure gauge with anti-blockage pressure guide pipe has a pressure measuring hole and a clearing hole on the adjusting plug. The pressure measuring hole on the adjusting plug can be connected to the vertical hole to measure the pressure of the medium. When the pressure measuring hole and the clearing hole are connected, the pipe walls of the pressure inlet pipe and the clearing pipe can be flushed to prevent blockage. The adjusting plug can also block the vertical hole, so that the top shell can be separated from the bottom shell, which is convenient for the inspection and replacement of the diaphragm. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the cross-sectional structure of the present invention; Figure 3 For the present invention Figure 2 Enlarged structural diagram at point A in the diagram; Figure 4 This is a schematic diagram of the pressure gauge body structure of the present invention; Figure 5 This is a schematic diagram of the cross-sectional structure of the pressure gauge body of the present invention; Figure 6 For the present invention Figure 5 Enlarged structural diagram at point B in the diagram; Figure 7 This is a schematic diagram of the adjustment structure of the present invention; Figure 8 This is a schematic diagram of the unfolded structure of the pressure gauge body of the present invention; Figure 9 This is a schematic diagram of the adjusting plug structure of the present invention; Figure 10 This is a schematic diagram of the adjusting disc structure of the present invention.

[0018] In the diagram: 1. Pressure gauge body; 2. Pressure transmitter; 3. Left pressure tap; 4. Right pressure tap; 5. Orifice plate; 6. Left pressure tap; 7. Right pressure tap; 8. Return port; 9. Inlet pipe; 10. Outlet pipe; 11. Right medium connection pipe; 12. Left medium connection pipe; 101, top shell; 102, bottom shell; 103, diaphragm; 104, adjusting shell; 105, vertical hole; 106, adjusting plug; 107, pressure measuring hole; 108, dredging hole; 109, ring groove; 110, piston sealing ring; 111, connecting rod; 112, connecting disc; 113, limiting block; 114, limiting groove; 115, sealing gasket; 116, fixed cover; 117, shaft sealing ring; 118, threaded rod; 119, worm gear; 120, worm; 121, protective shell; 122, protective cover; 123, observation shell; 124, observation groove; 125, adjusting disc; 126, pressure groove; 127, dredging groove; 128, plugging groove; 129, pressure inlet pipe; 130, dredging pipe. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0020] Please refer to Figures 1-10 The pressure gauge prevents the pressure inlet pipe from being blocked, comprising a pressure gauge body 1, a pressure transmitter 2 arranged on the right side of the pressure gauge body 1, a left side pressure taking pipe 3 and a right side pressure taking pipe 4 arranged on the bottom of the pressure gauge body 1 and the pressure transmitter 2, a liquid inlet pipe 9 arranged on the left side of the left side pressure taking pipe 3, a liquid outlet pipe 10 arranged on the right side of the right side pressure taking pipe 4, a hole plate 5 arranged between the left side pressure taking pipe 3 and the right side pressure taking pipe 4, a left side pressure taking hole 6 formed in the outer wall of the left side pressure taking pipe 3, a right side pressure taking hole 7 and a backflow hole 8 formed in the outer wall of the right side pressure taking pipe 4, a left side medium connecting pipe 12 and a right side medium connecting pipe 11 arranged on the inner wall of the left side pressure taking hole 6 and the right side pressure taking hole 7, and the left side medium connecting pipe 12 and the right side medium connecting pipe 11 are arranged on the pressure transmitter 2; In the above structure, the medium passes through the liquid inlet pipe 9, the left side pressure taking pipe 3, the hole plate 5, the right side pressure taking pipe 4 and the liquid outlet pipe 10. The medium enters the pressure gauge body 1 through the pressure inlet pipe 129. The pressure in the liquid inlet pipe 9 is detected by the pressure gauge body 1. At the same time, the medium enters the pressure transmitter 2 through the left side medium connecting pipe 12 and the right side medium connecting pipe 11. The volume mass and the volume flow of the fluid are obtained by the pressure transmitter 2. The hole plate 5 can throttle the medium in the pipeline. At this time, the medium pressure in front of the hole plate 5 is larger, the medium pressure behind the hole plate 5 is smaller, and a cavity region appears behind the hole plate 5. At this time, the medium in the pressure inlet pipe 129, the adjusting shell 104 and the inner cavity of the dredging pipe 130 can flow back to the right side pressure taking pipe 4, so that the medium in the pressure inlet pipe 129 can flow, and the medium accumulation in the pressure inlet pipe 129 can be avoided to cause blockage.

[0021] The pressure gauge body 1 comprises a top shell 101, the bottom of the top shell 101 is provided with a bottom shell 102, a diaphragm 103 is arranged between the top shell 101 and the bottom shell 102, the inner cavity of the bottom shell 102 penetrates a regulating shell 104, the inner cavity of the regulating shell 104 is provided with a vertical hole 105, the inner cavity of the vertical hole 105 is slidably connected with a regulating plug 106, the middle part of the regulating plug 106 is provided with a pressure measuring hole 107, and the right side of the pressure measuring hole 107 is provided with a dredging hole 108.

[0022] In the above structure, through the arrangement of the regulating plug 106, when the pressure measuring hole 107 on the regulating plug 106 is communicated with the vertical hole 105, at this time, the medium in the pressure inlet pipe 129 can pass through the pressure measuring hole 107 and the vertical hole 105 to the bottom shell 102, so that the diaphragm 103 can be in contact with the medium, by moving the regulating plug 106 to the left, gradually making the dredging hole 108 on the regulating plug 106 correspond to the vertical hole 105, at this time, the medium in the pressure inlet pipe 129 will enter the vertical hole 105, then enter the dredging hole 108 on the regulating plug 106, and then enter the dredging pipe 130, so that the medium in the pressure inlet pipe 129 can flow, at the same time, the regulating plug 106 can block the medium from entering the bottom shell 102, avoiding the contact between the medium and the diaphragm 103 when flowing, improving the service life of the diaphragm 103, when the regulating plug 106 moves to the right, at this time, the pressure measuring hole 107 and the dredging hole 108 are both located on the right side of the vertical hole 105, so that the regulating plug 106 can seal the vertical hole 105, improving the flexibility of the device.

[0023] In a preferred embodiment: the left side of the regulating plug 106 is provided with a connecting rod 111, the connecting rod 111 is fixed on the regulating plug 106 through a connecting disc 112, the end of the connecting rod 111 away from the regulating plug 106 is fixedly fitted with a threaded rod 118, the outer edge of the threaded rod 118 is fixedly provided with a worm gear 119, the outer edge of the worm gear 119 is threadedly connected with a worm 120, and the outer edge of the worm 120 is fixedly sleeved with an adjusting disc 125; In the above structure, by rotating the adjusting disc 125 clockwise, the worm 120 is driven to rotate, the worm 120 drives the worm gear 119 to rotate clockwise, the worm gear 119 drives the threaded rod 118 to move, at this time, the threaded rod 118 drives the connecting rod 111, the limiting block 113 and the regulating plug 106 to move to the left, when the adjusting disc 125 rotates counterclockwise, the regulating plug 106 can move to the right, through the self-locking function of the worm 120 and the worm gear 119, the cooperation of the worm 120 and the worm gear 119 can improve the stability of the regulating plug 106 in the static state, so that the regulating plug 106 will not displace, improving the stability of the device.

[0024] In a preferred implementation, the connecting disc 112 is in sliding connection with the adjusting housing 104, the outer edge of the connecting disc 112 is fixedly provided with a limiting block 113, the inner wall of the adjusting housing 104 is provided with a limiting groove 114, and the limiting block 113 is in sliding connection with the limiting groove 114. In the above structure, the limiting block 113 and the limiting groove 114 are used in cooperation, the connecting disc 112 is installed on the adjusting plug 106, the connecting disc 112 and the limiting block 113 position the adjusting plug 106, the adjusting plug 106 can only move horizontally, the pressure measuring hole 107 on the adjusting plug 106 corresponds to the dredging hole 108 and the vertical hole 105, and the rationality of the device is improved.

[0025] In a preferred implementation, the outer edge of the connecting rod 111 is in sliding connection with a shaft sealing ring 117, the outer wall of the shaft sealing ring 117 is fixedly provided with a fixed cover 116, the fixed cover 116 is installed on the adjusting housing 104, and a sealing gasket 115 is arranged between the fixed cover 116 and the adjusting housing 104. In the above structure, the shaft sealing ring 117 is arranged, the shaft sealing ring 117 can seal the gap between the fixed cover 116 and the connecting rod 111, the medium can be prevented from flowing out through the gap between the fixed cover 116 and the connecting rod 111, and the sealing performance of the device is improved.

[0026] In a preferred implementation, the outer wall of the adjusting housing 104 is provided with a protective shell 121, the worm wheel 119 is movably connected to the protective shell 121, the worm gear 120 is movably connected to the protective shell 121, and the outer edge of the protective shell 121 is provided with a protective cover 122. In the above structure, the protective shell 121 is arranged, the worm gear 120 and the worm wheel 119 can be installed on the protective shell 121, the protective shell 121 can mesh the worm gear 120 and the worm wheel 119, the protective shell 121 and the protective cover 122 can protect the worm gear 120 and the worm wheel 119, impurities can be prevented from contacting the worm gear 120 and the worm wheel 119, and the stability of the device in operation is improved.

[0027] In a preferred implementation, the two ends of the adjusting plug 106 are provided with ring grooves 109, the inner wall of the ring groove 109 is provided with a piston sealing ring 110, and the piston sealing ring 110 is in sliding connection with the adjusting housing 104. In the above structure, the ring groove 109 is arranged on the adjusting plug 106, the piston sealing ring 110 can be installed on the ring groove 109, the piston sealing ring 110 is attached to the inner wall of the adjusting housing 104, the medium cannot flow out through the gap between the adjusting plug 106 and the adjusting housing 104, and the sealing performance of the device is further improved.

[0028] In a preferred implementation: the pressure hole 107 penetrates the adjusting plug 106, the water inlet of the dredging hole 108 is located below the adjusting plug 106, and the water outlet of the dredging hole 108 is located on the right side of the adjusting plug 106; In the above structure, by penetrating the adjusting plug 106 with the pressure hole 107, the medium can pass through the adjusting plug 106 into the bottom shell 102 through the pressure hole 107, when the water inlet of the dredging hole 108 corresponds to the vertical hole 105, at this time the medium can enter the dredging hole 108 through the vertical hole 105, and then be discharged, because the dredging hole 108 does not penetrate the adjusting plug 106, so that the adjusting plug 106 can block the vertical hole 105 when the dredging hole 108 corresponds to the vertical hole 105, so that the medium cannot enter the bottom shell 102 to contact the diaphragm 103, thereby improving the rationality of the device.

[0029] In a preferred implementation: the outer edge of the adjusting disc 125 is provided with pressure grooves 126, dredging grooves 127 and blocking grooves 128, and the pressure grooves 126, the dredging grooves 127 and the blocking grooves 128 are uniformly distributed on the adjusting disc 125; In the above structure, by the arrangement of the pressure grooves 126, the dredging grooves 127 and the blocking grooves 128, the positions of the adjusting plug 106 can be known, when the pressure grooves 126 are upward, the pressure hole 107 on the adjusting plug 106 is in communication with the vertical hole 105, when the dredging grooves 127 are upward, the dredging hole 108 on the adjusting plug 106 is in communication with the vertical hole 105, so that the medium can enter the dredging pipe 130 through the dredging hole 108, when the blocking grooves 128 are upward, the adjusting plug 106 seals the vertical hole 105, so that the medium cannot enter the bottom shell 102, thereby facilitating the observation of the operating conditions of the pressure gauge by the operator.

[0030] In a preferred implementation: the top of the protective shell 121 is provided with an observation shell 123, the outer wall of the observation shell 123 is provided with an observation groove 124, and the adjusting disc 125 rotates in the inner cavity of the observation shell 123; In the above structure, by the arrangement of the observation groove 124, the observation groove 124 can improve the accuracy of the position of the adjusting plug 106, so that the pressure hole 107 on the adjusting plug 106 can completely correspond to the vertical hole 105, thereby improving the accuracy of pressure detection.

[0031] In a preferred implementation: the inner wall of the bottom of the bottom shell 102 is provided with an inlet pressure pipe 129, the inner wall of the end of the adjusting shell 104 away from the protective shell 121 is provided with a dredging pipe 130, the end of the dredging pipe 130 away from the adjusting shell 104 is fixedly sleeved in the backflow hole 8, and the inlet pressure pipe 129 penetrates the liquid inlet pipe 9; The medium in the liquid inlet pipe 9 can enter the pressure gauge body 1 through the pressure inlet pipe 129, and the pressure of the medium can be detected by the pressure gauge body 1. The pressure inlet pipe 129 can be connected to the dredging pipe 130 through the dredging pipe 130, and the medium in the liquid inlet pipe 9 can flow into the dredging pipe 130 through the pressure inlet pipe 129. The medium in the pressure inlet pipe 129 can flow under the pressure of the medium, so that the inner wall of the pressure inlet pipe 129 and the dredging pipe 130 can be flushed, and the pressure inlet pipe 129 and the dredging pipe 130 can be effectively prevented from being blocked.

[0032] The working principle is that when the liquid inlet pipe 9, the left side pressure pipe 3, the right side pressure pipe 4 and the liquid outlet pipe 10 have medium flowing therein, the medium can enter the bottom of the bottom shell 102 through the pressure inlet pipe 129. At this time, the adjusting plug 106 is connected to the vertical hole 105, and the medium flows into the bottom shell 102 through the pressure measuring hole 107 on the adjusting plug 106 and contacts the diaphragm 103. At this time, the pressure gauge body 1 can measure the pressure of the medium. When it is necessary to dredge the pressure inlet pipe 129 and the dredging pipe 130, the adjusting disc 125 is rotated clockwise to drive the worm 120 to rotate, the worm 120 drives the worm wheel 119 to rotate clockwise, the worm wheel 119 drives the threaded rod 118, the connecting rod 111, the connecting disc 112, the limiting block 113 and the adjusting plug 106 to move to the left in the adjusting shell 104. When the dredging groove 127 corresponds to the observation groove 124 on the observation shell 123, the dredging hole 108 on the adjusting plug 106 corresponds to the vertical hole 105, the medium in the pressure inlet pipe 129 enters the vertical hole 105, and then enters the dredging hole 108, and then is discharged into the right side pressure pipe 4 through the dredging pipe 130. The adjusting disc 125 is rotated counterclockwise to drive the worm 120 to rotate, the worm 120 drives the worm wheel 119 to rotate counterclockwise, the worm wheel 119 drives the threaded rod 118, the connecting rod 111, the connecting disc 112, the limiting block 113 and the adjusting plug 106 to move to the right in the adjusting shell 104. When the blockage groove 128 corresponds to the observation groove 124 on the observation shell 123, the dredging hole 108 on the adjusting plug 106 is located on the right side of the vertical hole 105, and the adjusting plug 106 blocks the vertical hole 105, so that the medium cannot enter the bottom shell 102. At this time, the top shell 101 can be removed from the bottom shell 102 to repair and replace the diaphragm 103, and the entire pressure gauge does not need to be disassembled for repair.

[0033] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that other inventors can develop based on the same general inventive concepts embodied by the described embodiments. That is, although the present application is described in terms of particular embodiments and implementations, it is to be understood that the terminology used is for the purpose of descriptive clarity and that it should be taken in its broadest possible sense. This is especially so where "comprising", "including", "containing", "characterized by" or the like are used as subordinating conjunctions. In this context, "comprising" is intended to mean that the embodiments can include a combination of one or more elements and / or features, including those not expressly described, without necessarily relying on any of the other features or elements not expressly described. In addition, it is to be understood that the described embodiments include any alterative or equivalent implementations or substitutions for one or more of the elements or features described. Any such alternatives or equivalents are intended to be encompassed by the description of the described embodiments.

[0034] While the embodiments of the application have been shown and described herein, it is to be understood that the application is not limited to these embodiments. Rather, many modifications, changes, alternatives and variations will be apparent to those skilled in the art once the teachings of the present disclosure have been known. It is therefore contemplated that the application shall cover any and all such modifications, changes, alternatives and variations as fall within the true spirit and scope of the present application.

Claims

1. A pressure gauge for preventing blockage of the pressure guide tube, comprising a pressure gauge body (1), characterized in that: A pressure transmitter (2) is provided on the right side of the pressure gauge body (1). A left pressure tapping pipe (3) and a right pressure tapping pipe (4) are provided at the bottom of the pressure gauge body (1) and the pressure transmitter (2). An inlet pipe (9) is installed on the left side of the left pressure tapping pipe (3), and an outlet pipe (10) is installed on the right side of the right pressure tapping pipe (4). An orifice plate (5) is installed between the left pressure tapping pipe (3) and the right pressure tapping pipe (4). A left pressure tapping hole (6) is opened on the outer wall of the left pressure tapping pipe (3), and a right pressure tapping hole (7) and a return hole (8) are opened on the outer wall of the right pressure tapping pipe (4). A left medium connection pipe (12) and a right medium connection pipe (11) are installed on the inner walls of the left pressure tapping hole (6) and the right pressure tapping hole (7). The left medium connection pipe (12) and the right medium connection pipe (11) are installed on the pressure transmitter (2). The pressure gauge body (1) includes a top housing (101), a bottom housing (102) is provided at the bottom of the top housing (101), a diaphragm (103) is provided between the bottom housing (102) and the top housing (101), an adjusting housing (104) is passed through the inner cavity of the bottom housing (102), a vertical hole (105) is opened in the inner cavity of the adjusting housing (104) and the bottom housing (102), an adjusting plug (106) is slidably connected in the inner cavity of the vertical hole (105), a pressure measuring hole (107) is opened in the middle of the adjusting plug (106), and a dredging hole (108) is opened on the right side of the pressure measuring hole (107).

2. A pressure gauge for preventing blockage of the pressure guide tube according to claim 1, characterized in that: A connecting rod (111) is provided on the left side of the adjusting plug (106). The connecting rod (111) is fixed to the adjusting plug (106) by a connecting plate (112). A threaded rod (118) is fixedly fitted at the end of the connecting rod (111) away from the adjusting plug (106). A worm gear (119) is fixedly adjusted on the outer edge of the threaded rod (118). A worm (120) is threadedly connected to the outer edge of the worm gear (119). An adjusting plate (125) is fixedly sleeved on the outer edge of the worm (120).

3. A pressure gauge for preventing blockage of the pressure guide tube according to claim 2, characterized in that: The connecting plate (112) is slidably connected to the adjusting housing (104). A limiting block (113) is fixedly mounted on the outer edge of the connecting plate (112). A limiting groove (114) is opened on the inner wall of the adjusting housing (104). The limiting block (113) is slidably connected to the limiting groove (114).

4. A pressure gauge for preventing blockage of the pressure-conducting tube according to claim 2, characterized in that: The outer edge of the connecting rod (111) is slidably connected to a shaft seal ring (117), and a fixing cover (116) is fixedly mounted on the outer wall of the shaft seal ring (117). The fixing cover (116) is installed on the adjusting housing (104), and a sealing gasket (115) is provided between the fixing cover (116) and the adjusting housing (104).

5. A pressure gauge for preventing blockage of the pressure guide tube according to claim 2, characterized in that: The outer wall of the adjusting housing (104) is fitted with a protective shell (121), the worm gear (119) is movably connected to the protective shell (121), the worm (120) is movably connected to the protective shell (121), and a protective cover (122) is fitted on the outer edge of the protective shell (121).

6. A pressure gauge for preventing blockage of the pressure-conducting tube according to claim 1, characterized in that: Both ends of the adjusting plug (106) are provided with annular grooves (109), and a piston sealing ring (110) is installed on the inner wall of the annular groove (109). The piston sealing ring (110) is slidably connected to the adjusting housing (104).

7. A pressure gauge for preventing blockage of the pressure-conducting tube according to claim 1, characterized in that: The pressure measuring hole (107) passes through the regulating plug (106), the inlet of the unblocking hole (108) is located below the regulating plug (106), and the outlet of the unblocking hole (108) is located to the right of the regulating plug (106).

8. A pressure gauge for preventing blockage of the pressure guide tube according to claim 2, characterized in that: The outer edge of the regulating plate (125) is provided with a pressure groove (126), a clearing groove (127) and a blocking groove (128), which are evenly distributed on the regulating plate (125).

9. A pressure gauge for preventing blockage of the pressure-conducting tube according to claim 5, characterized in that: An observation shell (123) is installed on the top of the protective shell (121). An observation groove (124) is opened on the outer wall of the observation shell (123). The adjustment plate (125) rotates in the inner cavity of the observation shell (123).

10. A pressure gauge for preventing blockage of the pressure guide tube according to claim 1, characterized in that: The bottom shell (102) has an inlet pipe (129) installed on its inner wall. The regulating shell (104) has a drain pipe (130) installed on its inner wall at the end away from the protective shell (121). The end of the drain pipe (130) away from the regulating shell (104) is fixedly sleeved in the return hole (8). The inlet pipe (129) passes through the liquid inlet pipe (9).

Images