Air-fuel proportional valve

Abstract

The utility model discloses an air-fuel proportional valve, which relates to the field of proportional valves and comprises a lower valve body and an upper valve body, a partition plate is mounted between the lower valve body and the upper valve body, a diaphragm is mounted on the edge of the partition plate, the diaphragm is fixedly connected with the inner wall of the lower valve body, a sleeve is mounted at the bottom end of the lower valve body, and a fixing bolt and a fixing sleeve are connected to the bottom end of the sleeve. The fixing sleeve is fixed to the bottom end of the sleeve, the fixing bolt is installed in the fixing sleeve, the end of the fixing bolt is connected with a return spring and a screw rod, the screw rod is located in the sleeve, an adjusting plate is installed on the outer wall of the screw rod, four sets of adjusting springs are installed at the top end of the adjusting plate, and each set of adjusting springs is fixedly connected with the bottom end of the partition plate. And a guide rod is mounted in the adjusting spring. Through the arrangement of the four groups of adjusting springs, different positions of the adjusting plate can be uniformly supported through the four groups of uniformly arranged adjusting springs, so that the partition plate is fully supported, and the supporting stability is improved.

Description

Technical Field

[0001] The utility model relates to the field of proportional valves, in particular to an air-fuel proportional valve. Background Art

[0002] The air-fuel ratio valve is a valve that adjusts the downstream pressure of the gas by the pressure of the air intake pipe to achieve the air-gas ratio.

[0003] The prior art CN219796240U discloses a novel air-fuel ratio valve, comprising a valve body, wherein the valve body is divided by a partition into a gas chamber for gas to pass through and a pressure balancing chamber for air to pass through, the gas chamber is divided by a valve core into a gas inlet chamber for inputting gas and a gas outlet chamber for discharging gas to the burner, and the pressure balancing chamber is divided by a diaphragm into an air pressure chamber for connecting with an air pipe and a gas pressure chamber for connecting with the gas outlet chamber. The valve body is provided with a first pressure regulating pipeline that penetrates the valve body and connects the gas pressure chamber with the gas outlet chamber, the outlet of the first pressure regulating pipeline is located in the gas outlet chamber, and the diaphragm is connected to the valve core. When the pressure in the air pressure chamber is greater than the pressure in the gas pressure chamber, the diaphragm is pushed by the air to move toward the gas pressure chamber, and the valve core is driven by the diaphragm to move upward, so that the flow area between the gas inlet chamber and the gas outlet chamber is increased, the pressure in the gas outlet chamber is increased, and the pressure in the gas pressure chamber is increased accordingly until the balance is re-established. The gas pressure chamber is provided with a second pressure regulating port, and the second pressure regulating port is used to install a second pressure regulating pipe that directly connects the gas pressure chamber with the gas outlet pipe. The gas pressure chamber is provided with a plug for blocking the first pressure regulating pipe or the second pressure regulating port, and the plug is detachable. Its function is that, through the arrangement of the second pressure regulating pipe and the plug, when the installation of the proportional valve is restricted, the layout of the intermediate pipe between the proportional valve outlet and the burner gas inlet is longer, that is, when the length of the gas outlet pipe is longer, the plug is used to block the first pressure regulating pipe, open the second pressure regulating port, and allow air to be directly connected to the gas outlet pipe through the second pressure regulating pipe, so that the distance between the outlet of the second pressure regulating pipe and the burner is smaller than the distance between the outlet of the first pressure regulating pipe and the burner, so that the pressure loss caused by the second pressure regulating pipe is smaller than the pressure loss caused by the first pressure regulating pipe, which is beneficial for the burner to ensure a constant air-fuel ratio.

[0004] However, during use of the prior art, in order to adapt to different gas pressures, the position of the partition is usually adjusted. The existing adjustment method usually uses a fixing bolt to adjust the internal spring to achieve the adjustment of the partition. However, after the fixing bolt is adjusted, the fixing bolt cannot be limited. Under the long-term pulling of the spring and the partition, the position of the fixed spring will be offset. Utility Model Content

[0005] Based on this, the purpose of the utility model is to provide an air-fuel ratio valve to solve the technical problem that the fixing bolts are difficult to adjust and limit.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an air-fuel ratio valve, comprising a lower valve body and an upper valve body, a partition is installed between the lower valve body and the upper valve body, a diaphragm is installed at the edge of the partition, the diaphragm is fixedly connected to the inner wall of the lower valve body, a sleeve is installed at the bottom end of the lower valve body, the bottom end of the sleeve is connected with a fixing bolt and a fixing sleeve, the fixing sleeve is fixed to the bottom end of the sleeve, the fixing bolt is installed inside the fixing sleeve, the end of the fixing bolt is connected with a return spring and a screw, the screw is located inside the sleeve, and an adjusting plate is installed on the outer wall of the screw, four groups of adjusting springs are installed on the top of the adjusting plate, and each group of adjusting springs is fixedly connected to the bottom end of the partition, a guide rod is installed inside the adjusting spring, a positioning rod is installed on the outer side of the fixing bolt, a positioning sheet is installed at the bottom end of the fixing sleeve, and the positioning rod is engaged with the positioning sheet.

[0007] By adopting the above technical solution, the screw rod can be adjusted by the fixing bolt, so that the position of the adjustment plate can be adjusted up and down, thereby changing the pressure change inside the valve body, and the fixing bolt can be limited by the positioning rod and the positioning plate.

[0008] The utility model is further configured that a mounting tube is provided at the top end of the upper valve body, and the mounting tube is connected to an external pipeline.

[0009] By adopting the above technical solution, it is possible to connect with the outside world through the connecting tube.

[0010] The utility model is further configured such that the bottom end of the fixing bolt is connected to a rotating head, and a return spring is fixed to the outer wall of the rotating head, the end of the screw rod is connected to a connecting tube, the interior of the connecting tube is hollow, the bottom end of the rotating head is connected to a diamond-shaped plug rod, the diamond-shaped plug rod is inserted into the interior of the connecting tube, and a return spring is installed between the connecting tube and the diamond-shaped plug rod.

[0011] By adopting the above technical solution, the fixing bolt can be easily slid on the outside of the connecting tube, and the connecting tube can be driven to rotate by the fixing bolt.

[0012] The utility model is further configured that a fixing seat is installed at the bottom end of the fixing sleeve, the fixing seat is fitted with the rotating head, and the positioning sheet surrounds the outer side of the fixing seat.

[0013] By adopting the above technical solution, the fixing bolts can be conveniently fixed in different directions, thereby improving the fixing effect.

[0014] The utility model is further configured that each group of guide rods is fixed at the bottom end of the partition, and the guide rods penetrate the adjustment plate, and the adjustment plate is sleeved on the outer side of the guide rods.

[0015] By adopting the above technical solution, it is convenient to limit the adjustment plate through the guide rod to prevent the adjustment plate from rotating.

[0016] The utility model is further configured such that the top ends of the positioning pieces are inclined, and the positioning pieces are arranged in pairs, and the spacing between two adjacent groups of positioning pieces matches the spacing between the positioning rods.

[0017] By adopting the above technical solution, it is convenient to insert the positioning rod into the positioning piece.

[0018] The utility model is further configured that a rubber ring is installed on the outer side of the bottom end of the adjusting plate, and the adjusting plate is sealed and connected with the sleeve through the rubber ring.

[0019] By adopting the above technical solution, the friction between the adjustment plate and the sleeve can be reduced.

[0020] In summary, the utility model mainly has the following beneficial effects:

[0021] 1. The utility model is provided with a fixing bolt and a fixing sleeve. During use, the fixing bolt can be pulled out to draw the positioning rod out of the positioning piece, thereby releasing the limit on the fixing bolt. Subsequently, the fixing bolt is rotated to drive the screw rod to rotate, and the screw rod drives the adjustment plate to move. The adjustment plate adjusts the tightness of the adjustment spring. After the adjustment is completed, the pulling of the fixing bolt is released, and the fixing bolt is pulled back by the return spring, so that the positioning rod is inserted into the positioning piece, thereby limiting the fixing bolt.

[0022] 2. The utility model provides four groups of adjusting springs, which are evenly arranged, and can evenly support different positions of the adjusting plate, thereby fully supporting the partition and improving the supporting stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the utility model;

[0024] Figure 2 It is a structural schematic diagram of the cross section of the lower valve body of the utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the adjustment plate and the adjustment spring of the utility model;

[0026] Figure 4 This is a schematic diagram of the structure of the fixing bolt and the fixing sleeve of the utility model;

[0027] Figure 5 It is a structural schematic diagram of the explosion structure of the fixing bolt of the utility model.

[0028] In the figure: 1. lower valve body; 2. upper valve body; 201. mounting cylinder; 3. sleeve; 4. fixing bolt; 401. rotating head; 402. return spring; 403. screw; 404. positioning rod; 405. diamond-shaped plug rod; 406. connecting cylinder; 5. fixing sleeve; 501. fixing seat; 502. positioning plate; 6. adjusting plate; 7. adjusting spring; 8. guide rod; 9. partition; 10. diaphragm. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. The embodiments described below with reference to the drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model.

[0030] The following describes an embodiment of the utility model based on its overall structure.

[0031] Air-fuel ratio valve, such as Figures 1 to 5 As shown, it includes a lower valve body 1 and an upper valve body 2, a partition 9 is installed between the lower valve body 1 and the upper valve body 2, a diaphragm 10 is installed on the edge of the partition 9, and the diaphragm 10 is fixedly connected to the inner wall of the lower valve body 1, a sleeve 3 is installed at the bottom end of the lower valve body 1, and a fixing bolt 4 and a fixing sleeve 5 are connected to the bottom end of the sleeve 3. The fixing bolt 4 is installed inside the fixing sleeve 5, and the end of the fixing bolt 4 is connected to a return spring 402 and a screw The bottom end of the screw 403 is connected to the rotating head 401, and the return spring 402 is fixed to the outer wall of the rotating head 401. The end of the screw 403 is connected to the connecting tube 406, and the connecting tube 406 is hollow. The bottom end of the rotating head 401 is connected to the diamond-shaped plug rod 405, which is inserted into the connecting tube 406, and the return spring 402 is installed between the connecting tube 406 and the diamond-shaped plug rod 405. The screw 403 is located in the sleeve. 3, and an adjusting plate 6 is installed on the outer wall of the screw 403, four groups of adjusting springs 7 are installed on the top of the adjusting plate 6, and each group of adjusting springs 7 is fixedly connected to the bottom end of the partition 9, and a guide rod 8 is installed inside the adjusting spring 7, each group of guide rods 8 is fixed to the bottom end of the partition 9, and the guide rod 8 passes through the adjusting plate 6, and the adjusting plate 6 is sleeved on the outside of the guide rod 8, and a positioning rod 404 is installed on the outside of the fixing bolt 4. When adjusting, the fixing bolt 4 is pulled out, the diamond plug 405 is pulled out from the connecting tube 406, and the return spring 402 is pulled, so that the positioning rod 404 is pulled out from the positioning piece 502, and the limit on the fixing bolt 4 is released, and then the fixing bolt 4 is rotated, and the fixing bolt 4 drives the connecting tube 406 and the screw 403 to rotate through the diamond plug 405, and the screw 403 rotates the position of the adjusting plate 6, thereby adjusting the upper and lower positions of the adjusting plate 6.

[0032] See also Figure 2 A positioning piece 502 is installed at the bottom end of the fixing sleeve 5, and the positioning rod 404 is engaged with the positioning piece 502, which can facilitate the fixing of the fixing bolt 4.

[0033] See also Figure 1 A mounting tube 201 is provided at the top of the upper valve body 2, and the mounting tube 201 is connected to an external pipeline.

[0034] See also Figure 2 A fixing seat 501 is installed at the bottom end of the fixing sleeve 5 , the fixing seat 501 is in contact with the rotating head 401 , and the positioning piece 502 surrounds the outer side of the fixing seat 501 .

[0035] See also Figure 4 The top of the positioning piece 502 is an inclined surface, and the positioning pieces 502 are arranged in pairs. The distance between two adjacent groups of positioning pieces 502 matches the distance between the positioning rods 404, so that the positioning rods 404 are easily inserted into the interior of the positioning pieces 502.

[0036] See also Figure 2 A rubber ring is installed on the outer side of the bottom end of the adjusting plate 6, and the adjusting plate 6 is sealed and connected with the sleeve 3 through the rubber ring to improve the sealing effect.

[0037] Before use, the position of the partition plate 9 in the proportional valve needs to be adjusted according to the pressure of the external gas and air. During the adjustment process, the fixing bolt 4 is first pulled out, the diamond-shaped plug rod 405 is pulled out from the connecting tube 406, and the return spring 402 is pulled, so that the positioning rod 404 is pulled out from the positioning piece 502, and the limit on the fixing bolt 4 is released. Then, the fixing bolt 4 is rotated, and the fixing bolt 4 drives the connecting tube 406 and the screw 403 to rotate through the prism-shaped plug rod 405, and the screw 403 is The position of the adjusting plate 6 is rotated, thereby adjusting the up and down position of the adjusting plate 6, so that the adjusting plate 6 adjusts the tightness of the adjusting spring 7. After the adjustment, the pulling on the fixing bolt 4 is released, and the fixing bolt 4 is returned under the drive of the return spring 402, and the positioning rod 404 is reinserted into the positioning sheet 502 to fix the fixing bolt 4, thereby limiting the fixing bolt 4 to avoid the subsequent deflection of the fixing bolt 4 under the action of elastic force, etc., and the accuracy of the proportional valve is used;

[0038] Furthermore, during use, the partition 9 can be limited and positioned at four positions through four groups of adjusting springs 7, which can effectively increase the contact position and area between the adjusting springs 7 and the partition 9, thereby improving the stability of the partition 9.

[0039] Although an embodiment of the utility model has been shown and described, this specific embodiment is merely an explanation of the utility model and is not a limitation of the utility model. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contributions as needed without departing from the principles and purpose of the utility model. However, as long as they are within the scope of the claims of the utility model, they are protected by patent law.

Claims

1. An air-fuel ratio valve, comprising a lower valve body (1) and an upper valve body (2), characterized in that: A partition (9) is installed between the lower valve body (1) and the upper valve body (2), a diaphragm (10) is installed on the edge of the partition (9), and the diaphragm (10) is fixedly connected to the inner wall of the lower valve body (1). A sleeve (3) is installed at the bottom end of the lower valve body (1), and the bottom end of the sleeve (3) is connected to a fixing bolt (4) and a fixing sleeve (5), the fixing sleeve (5) is fixed to the bottom end of the sleeve (3), the fixing bolt (4) is installed inside the fixing sleeve (5), and the end of the fixing bolt (4) is connected to a return spring (402) and a screw. (403), the screw rod (403) is located inside the sleeve (3), and an adjustment plate (6) is installed on the outer wall of the screw rod (403), four groups of adjustment springs (7) are installed on the top of the adjustment plate (6), and each group of adjustment springs (7) is fixedly connected to the bottom end of the partition (9), and a guide rod (8) is installed inside the adjustment spring (7), a positioning rod (404) is installed on the outer side of the fixing bolt (4), and a positioning plate (502) is installed on the bottom end of the fixing sleeve (5), and the positioning rod (404) is engaged with the positioning plate (502).

2. The air-fuel ratio valve according to claim 1, characterized in that: A mounting tube (201) is provided at the top end of the upper valve body (2), and the mounting tube (201) is connected to an external pipeline.

3. The air-fuel ratio valve according to claim 1, characterized in that: The bottom end of the fixing bolt (4) is connected to a rotating head (401), and a return spring (402) is fixed to the outer wall of the rotating head (401). The end of the screw rod (403) is connected to a connecting tube (406), the interior of the connecting tube (406) is hollow, the bottom end of the rotating head (401) is connected to a diamond-shaped plug rod (405), the diamond-shaped plug rod (405) is inserted into the interior of the connecting tube (406), and a return spring (402) is installed between the connecting tube (406) and the diamond-shaped plug rod (405).

4. The air-fuel ratio valve according to claim 3, characterized in that: A fixing seat (501) is installed at the bottom end of the fixing sleeve (5), the fixing seat (501) is fitted with the rotating head (401), and the positioning sheet (502) surrounds the outer side of the fixing seat (501).

5. The air-fuel ratio valve according to claim 1, characterized in that: Each group of guide rods (8) is fixed to the bottom end of the partition plate (9), and the guide rods (8) penetrate the adjustment plate (6), and the adjustment plate (6) is sleeved on the outside of the guide rods (8).

6. The air-fuel ratio valve according to claim 1, characterized in that: The top end of the positioning piece (502) is an inclined surface, and the positioning pieces (502) are arranged in pairs, and the spacing between two adjacent groups of positioning pieces (502) matches the spacing between the positioning rods (404).

7. The air-fuel ratio valve according to claim 1, characterized in that: A rubber ring is installed on the outer side of the bottom end of the adjustment plate (6), and the adjustment plate (6) is sealedly connected to the sleeve (3) via the rubber ring.

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