Exhaust structure of pressure transmitter

Abstract

The utility model relates to an exhaust structure of a pressure transmitter, which comprises two templates arranged at two ends of a pressure sensor, one side of each template is provided with an air inlet channel, the other side of each template is provided with an exhaust channel, the exhaust channel is communicated with the air inlet channel, and a valve needle is arranged in the exhaust channel in a threaded manner. A first conical part, a horizontal part and a second conical part are sequentially arranged at the end, close to the air inlet channel, of the exhaust channel, the structure of the valve needle is matched with that of the exhaust channel, and a sealing gasket is arranged at the end of the valve needle. An air inlet is formed in the outer surface of the valve needle corresponding to the horizontal part; and an air outlet is formed in the outer surface of the valve needle outside the exhaust channel. After the valve needle is tightened, the positioning screw is screwed into the positioning screw hole, so that the angle of the valve needle can be fixed, the valve needle is installed in the exhaust channel in a threaded mode, when the angle of the valve needle is fixed, the valve needle cannot rotate, the situation of air leakage caused by looseness of the valve needle can be avoided, and the accuracy of monitoring data is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to pressure transmitter technical field, concretely is a kind of pressure transmitter exhaust structure. BACKGROUND

[0002] Pressure transmitter is a kind of industrial instrument that gas or liquid pressure is converted into standard electrical signal, for remote transmission, display, recording or control in industrial automation, process control, monitoring and measurement system.

[0003] The utility model discloses a kind of pressure transmitter exhaust structure, the pressure transmitter exhaust structure, by rotating valve needle can open exhaust passage, so as to the gas or liquid in air inlet passage is promptly discharged from pressure transmitter. Meanwhile, the plugging structure between valve needle and exhaust passage is reasonably designed, with the technical advantage that operation is convenient.

[0004] But the outlet end of the above-mentioned patent gas leakage passage is coaxial with valve needle, when rotating valve needle, gas is directly discharged outward from gas leakage passage, if the installation height of pressure transmitter is equal to the height of face, gas may be directly blown to face due to not paying attention to operation, if harmful component is contained in gas, then it can cause certain damage to body, and the above-mentioned patent only by screwing the valve needle in gas leakage passage with the way of thread connection, stability is not strong, after a period of use, valve needle is prone to loosen, in turn, leading to gas leakage and affecting monitoring accuracy. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of pressure transmitter exhaust structure, effectively solve the problem raised in the above background.

[0006] To achieve the above object, the utility model provides the following technical scheme.

[0007] A kind of pressure transmitter exhaust structure, including the two templates of being installed in pressure sensor both ends, the side of template is equipped with air inlet passage, the other side of template is equipped with exhaust passage, and exhaust passage is communicated with air inlet passage, the inside thread of exhaust passage is installed with valve needle, the end of exhaust passage close to air inlet passage is sequentially provided with first conical portion, horizontal portion and second conical portion, the structure of valve needle is matched with exhaust passage, and the end of valve needle is provided with sealing pad. The outer surface of valve needle is equipped with air inlet hole at horizontal portion, the outer surface of valve needle outside exhaust passage is equipped with air outlet hole, the inside of valve needle is equipped with gas leakage passage, and air inlet hole and air outlet hole are communicated with gas leakage passage. The outer surface of valve needle outside exhaust passage is equipped with positioning screw hole, the outer surface of template is installed with fixed block, the inside thread of fixed block is installed with positioning screw, and positioning screw is matched with positioning screw hole.

[0008] Further, the outer surface of the valve needle is provided with a sealing ring at the horizontal part, and the sealing ring is attached to the inner wall of the horizontal part.

[0009] Further, the sealing ring is provided with a first arc part on the side facing the air inlet channel, and a second arc part is arranged at the junction of the first taper part and the horizontal part.

[0010] Further, the inside of the air leakage channel is rotatably provided with a rotating shaft, and the outer surface of the rotating shaft is provided with a scraper in contact with the inner wall of the air leakage channel.

[0011] Further, the end of the rotating shaft penetrates to the outside of the valve needle and is provided with a torsion bar.

[0012] Further, the number of scrapers is four, and the four scrapers are coaxially and equiangularly distributed on the outer surface of the rotating shaft.

[0013] Further, the outer surface of the torsion bar is provided with a rubber pad, and the outer surface of the rubber pad is provided with anti-skid lines.

[0014] Compared with the prior art, the utility model has the beneficial effects as follows.

[0015] 1. The utility model discloses a gas outlet, which can blow out gas radially during exhaust, avoiding harmful gas from blowing to the face of a person, causing misabsorption and causing harm to the body.

[0016] 2. The utility model discloses that the angle of the valve needle can be fixed after the valve needle is tightened and the positioning screw is screwed into the positioning screw hole, and when the angle of the valve needle is fixed, the valve needle cannot rotate because the valve needle is screw-mounted in the exhaust channel, so that the situation that the valve needle loosens and causes gas leakage can be avoided, and the accuracy of monitoring data is ensured.

[0017] 3. The utility model discloses that the sealing ring and the horizontal part can seal the gap between the valve needle and the exhaust channel, avoiding the situation that harmful gas blows out axially along the gap between the valve needle and the exhaust channel during exhaust, causing misabsorption by a worker and causing harm to the body, and because there is a height difference between the sealing ring and the internal thread of the exhaust channel, the situation that the internal thread and the sealing ring are scratched when the valve needle is pulled out of the exhaust channel can be avoided.

[0018] 4. The utility model discloses that the rotating shaft drives the scraper to scratch the inner wall of the air leakage channel, and the impurities attached to the inner wall of the air leakage channel can be cleaned, and the situation that the inside of the air leakage channel is blocked by impurities can be avoided through regular cleaning. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a three-dimensional schematic view of the overall structure of the utility model;

[0020] Figure 2This is a cross-sectional structural diagram of the template in this utility model;

[0021] Figure 3 for Figure 2 Enlarged schematic diagram of the structure at point A in the middle;

[0022] Figure 4 This is a schematic diagram of the structure of the rotating shaft and scraper in this utility model.

[0023] In the diagram: 100, pressure sensor; 101, template; 102, air intake channel; 103, exhaust channel; 104, valve needle; 105, venting channel; 106, air inlet; 107, air outlet; 108, positioning screw hole; 109, fixing block; 110, positioning screw; 200, first conical part; 201, second conical part; 202, horizontal part; 203, sealing gasket; 300, sealing ring; 400, first arc-shaped part; 401, second arc-shaped part; 500, rotating shaft; 501, scraper; 600, torsion bar. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection" and "installation" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Furthermore, "connection" can be a direct connection or an indirect connection through an intermediate medium. "Fixed" means that the relative positional relationship remains unchanged after the connection. The directional terms mentioned in the embodiments of this utility model, such as "inner," "outer," "top," and "bottom," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this utility model, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0026] In this embodiment of the invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0027] Please see Figures 1-4 This utility model provides a pressure transmitter exhaust structure, including two templates 101 installed at both ends of a pressure sensor 100. One side of each template 101 has an air inlet channel 102, and the other side has an exhaust channel 103, which communicates with the air inlet channel 102. A valve needle 104 is threaded into the internal part of the exhaust channel 103. At the end of the exhaust channel 103 near the air inlet channel 102, a first conical portion 200, a horizontal portion 202, and a second conical portion 201 are sequentially arranged. The structure of the valve needle 104 matches the exhaust channel 103, and a sealing gasket 203 is provided at the end of the valve needle 104. An air inlet 106 is provided on the outer surface of the valve needle 104 corresponding to the horizontal portion 202. An air outlet 107 is provided on the outer surface of the valve needle 104 outside the exhaust channel 103. A venting channel 105 is provided inside the valve needle 104, and both the air inlet 106 and the air outlet 107 communicate with the venting channel 105. The valve needle 104 has a positioning screw hole 108 on its outer surface outside the exhaust channel 103. A fixing block 109 is installed on the outer surface of the template 101. A positioning screw 110 is installed in the internal thread of the fixing block 109, and the positioning screw 110 matches the positioning screw hole 108.

[0028] When in use, the valve needle 104 is tightened in the exhaust channel 103. The sealing gasket 203 at its end and the second conical part 201 are pressed against each other to form a seal. When exhaust is required, simply turn the valve needle 104 in the opposite direction to separate the sealing gasket 203 from the second conical part 201, so that the gas enters the venting channel 105 from the air inlet 106 and is then blown out radially from the air outlet 107. This avoids the harmful gas from blowing towards a person's face, causing accidental inhalation and harm to the body.

[0029] After tightening the valve needle 104 to seal the exhaust passage 103, screw the positioning screw 110 into the positioning screw hole 108 to fix the angle of the valve needle 104. Since the valve needle 104 is threaded in the exhaust passage 103, it cannot rotate when its angle is fixed, thus avoiding the situation where the valve needle 104 is loose and causes air leakage, and ensuring the accuracy of the monitoring data.

[0030] Since the valve needle 104 and the exhaust channel 103 are connected by threads and the threads match each other, when the valve needle 104 is screwed to the bottom, the forward distance and angle of the valve needle 104 are fixed due to the obstruction of the second conical part 201, thereby ensuring that the positioning screw hole 108 can be aligned with the positioning screw 110, and achieving the purpose of locking the valve needle 104.

[0031] Preferably, a sealing ring 300 is provided on the outer surface of the valve needle 104 at the horizontal part 202, and the sealing ring 300 is in contact with the inner wall of the horizontal part 202.

[0032] By providing the sealing ring 300 and the horizontal part 202, the gap between the valve needle 104 and the exhaust channel 103 can be sealed, thereby preventing harmful gases from being blown outward axially through the gap between the valve needle 104 and the exhaust channel 103 during exhaust, which could be accidentally inhaled by workers and cause harm to their bodies. Furthermore, due to the height difference between the sealing ring 300 and the internal thread of the exhaust channel 103, the internal thread and the sealing ring 300 are prevented from scraping when the valve needle 104 is pulled out of the exhaust channel 103.

[0033] Preferably, the sealing ring 300 has a first arc-shaped portion 400 on the side facing the air intake channel 102, and a second arc-shaped portion 401 is provided at the junction of the first conical portion 200 and the horizontal portion 202.

[0034] When the valve needle 104 is installed inside the exhaust channel 103, the first arc-shaped portion 400 of the sealing ring 300 contacts and is squeezed by the second arc-shaped portion 401, causing the sealing ring 300 to deform and smoothly enter the area of ​​the horizontal portion 202. The first arc-shaped portion 400 and the second arc-shaped portion 401 can prevent the sealing ring 300 from being scratched during the squeezing process, which could lead to damage.

[0035] Preferably, a rotating shaft 500 is rotatably mounted inside the venting channel 105, and a scraper 501 is mounted on the outer surface of the rotating shaft 500, with the scraper 501 in contact with the inner wall of the venting channel 105.

[0036] Since the gas may contain dust, when the dust passes through the venting channel 105, it is easy to adhere to its inner wall. After a period of use, the venting channel 105 may become blocked. Therefore, by setting up the rotating shaft 500 and the scraper 501, the rotating shaft 500 can drive the scraper 501 to scrape the inner wall of the venting channel 105, which can clean the impurities attached to the inner wall of the venting channel 105. The cleaned dust can be blown out during the exhaust process. By cleaning regularly, the blockage of the venting channel 105 by impurities can be avoided.

[0037] Preferably, the end of the rotating shaft 500 extends to the outside of the valve needle 104 and is fitted with a torsion bar 600.

[0038] With the torsion bar 600 in place, the rotating shaft 500 can be turned from the outside to rotate, which drives the scraper 501 to clean the inner wall of the venting channel 105.

[0039] Preferably, the number of scrapers 501 is four, and the four scrapers 501 are distributed on the outer surface of the rotating shaft 500 at equal angles along the same axis.

[0040] By setting up four scrapers 501, not only is the cleaning efficiency of the inner wall of the venting channel 105 higher, but the forces generated by each scraper 501 are balanced with each other, making the rotation of the shaft 500 more stable.

[0041] Preferably, the outer surface of the torsion bar 600 is provided with a rubber pad, and the outer surface of the rubber pad is provided with anti-slip texture.

[0042] The rubber pads and anti-slip textures increase the friction on the outer surface of the torsion bar 600, reducing the risk of slippage when turning it.

[0043] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A pressure transmitter exhaust structure, comprising two templates (101) installed at both ends of a pressure sensor (100), wherein an air inlet channel (102) is provided on one side of each template (101), and an exhaust channel (103) is provided on the other side of each template (101), and the exhaust channel (103) communicates with the air inlet channel (102), wherein a valve needle (104) is threaded into the internal part of the exhaust channel (103), characterized in that: The exhaust passage (103) is provided with a first conical part (200), a horizontal part (202) and a second conical part (201) in sequence at one end near the intake passage (102). The structure of the valve needle (104) matches the exhaust passage (103), and a sealing gasket (203) is provided at the end of the valve needle (104). An air inlet (106) is provided on the outer surface of the valve needle (104) corresponding to the horizontal part (202). An air outlet (107) is provided on the outer surface of the valve needle (104) located outside the exhaust channel (103). An air venting channel (105) is provided inside the valve needle (104), and both the air inlet (106) and the air outlet (107) are connected to the air venting channel (105). The valve needle (104) is provided with a positioning screw hole (108) on the outer surface of the exhaust channel (103). A fixing block (109) is installed on the outer surface of the template (101). A positioning screw (110) is installed in the internal thread of the fixing block (109), and the positioning screw (110) matches the positioning screw hole (108).

2. The pressure transmitter exhaust structure according to claim 1, characterized in that: A sealing ring (300) is provided on the outer surface of the valve needle (104) corresponding to the horizontal part (202), and the sealing ring (300) is in contact with the inner wall of the horizontal part (202).

3. The pressure transmitter exhaust structure according to claim 2, characterized in that: The sealing ring (300) has a first arc-shaped portion (400) on the side facing the air intake channel (102), and a second arc-shaped portion (401) is provided at the junction of the first conical portion (200) and the horizontal portion (202).

4. The pressure transmitter exhaust structure according to claim 1, characterized in that: A rotating shaft (500) is rotatably mounted inside the venting channel (105), and a scraper (501) is mounted on the outer surface of the rotating shaft (500). The scraper (501) is in contact with the inner wall of the venting channel (105).

5. The pressure transmitter exhaust structure according to claim 4, characterized in that: The end of the shaft (500) extends to the outside of the valve needle (104) and is fitted with a torsion bar (600).

6. The pressure transmitter exhaust structure according to claim 4, characterized in that: The number of scrapers (501) is four, and the four scrapers (501) are distributed on the outer surface of the rotating shaft (500) at equal angles along the same axis.

7. The pressure transmitter exhaust structure according to claim 5, characterized in that: The outer surface of the torsion bar (600) is provided with a rubber pad, and the outer surface of the rubber pad is provided with anti-slip texture.

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