Regulating valve for combustor

Abstract

A regulating valve used on a combustor comprises a valve body, a first oil way and a second oil way are formed in the valve body, a constant-resistance part is installed at the position, close to an oil outlet hole of the first oil way, of the first oil way, and the position, corresponding to an oil inlet hole of the constant-resistance part, of the first oil way is connected with an oil inlet hole of the second oil way. The valve body is provided with a flow adjusting part and a back pressure part which are communicated with or separated from the second oil way, the flow adjusting part and the back pressure part are sequentially arranged in the flowing direction of the second oil way, and the valve body is provided with a pressure sensor communicated with the first oil way. An electric heating pipe is further installed on the valve body, and the electric heating pipe and the back pressure part are arranged side by side. The electric heating device is compact in structure and small in size, a plurality of parts can be heated by starting the electric heating pipes, and heating is simple and convenient.

Description

Technical Field

[0001] The utility model relates to a regulating valve, more specifically to a regulating valve used on a burner. Background Art

[0002] At present, the conventional fuel burner of asphalt mixing station includes a burner body, a heating pipe and a monitoring control system, the monitoring control system includes an oil pump, the oil inlet of the burner body is connected to the oil tank through the first oil circuit, the first oil circuit is equipped with a solenoid valve, the first oil circuit is connected to the oil tank through the second oil circuit near the oil inlet of the solenoid valve, and the first oil circuit is equipped with oil pumps in sequence along the flow direction. Among them, at least one valve body is sometimes provided on the first oil circuit according to needs, such as a constant resistance valve or a flow regulating valve, etc. At this time, an electric heating tape needs to be wrapped around the outside of each valve body, and heating is more troublesome, especially the electric heating tape itself has a high failure rate, needs to be frequently replaced, is time-consuming and labor-intensive, and is more troublesome to disassemble and assemble.

[0003] In view of this, the applicant conducted in-depth research on this basis, which led to the emergence of this case. Utility Model Content

[0004] The utility model aims to provide a regulating valve for a burner, which has a compact structure and a small volume, and the electric heating tube can work after being started, and the heating is simple and convenient, saving time and labor, and the disassembly and assembly is also relatively convenient.

[0005] To achieve the above purpose, the solution of the utility model is:

[0006] A regulating valve for a burner comprises a valve body, wherein a first oil circuit and a second oil circuit are provided inside the valve body, a constant resistance portion is installed near the oil outlet of the first oil circuit, the first oil circuit is connected to the oil inlet of the second oil circuit at the oil inlet corresponding to the constant resistance portion, a flow regulating portion and a back pressure portion which are interconnected or disconnected with the second oil circuit are installed on the valve body, the flow regulating portion and the back pressure portion are arranged in sequence along the flow direction of the second oil circuit, a pressure sensor which is connected to the first oil circuit is installed on the valve body, and an electric heating pipe is also installed on the valve body, and the electric heating pipe is arranged side by side with the back pressure portion.

[0007] The first oil circuit and the second oil circuit are connected together through a three-way valve, and the three-way valve includes a first port, a second port, and a third port that are integrally connected.

[0008] The length direction of the valve body is taken as the transverse direction, and the direction horizontally perpendicular to the transverse direction is taken as the longitudinal direction. The constant resistance part and the flow regulating part are both arranged in the longitudinal direction, and the back pressure part is arranged in the transverse direction.

[0009] The constant resistance part includes a pressure regulating block, a pressure regulating spring and a sealing ball, the two ends of the pressure regulating spring are respectively connected to the pressure regulating block and the sealing ball, the pressure regulating block is fixedly installed in the first oil circuit near its oil outlet, and the pressure regulating block is a hollow structure with openings at both ends, the sealing ball is arranged in the first oil circuit, and the sealing ball is adapted to the first port.

[0010] The flow regulating part includes a regulating valve core and an regulating movement mechanism for driving the regulating valve core to move, the regulating movement mechanism includes a threaded sleeve, a preload spring and a connecting rod connected to the regulating valve core, an installation channel 1 is provided on the valve body, the installation channel 1 is communicated with the second oil circuit, the installation channel 1 is divided into a large head section and an installation section, the threaded sleeve is fixedly installed in the large head section, a threaded section adapted to the threaded sleeve is provided on the connecting rod, two ends of the preload spring are respectively abutted between the threaded sleeve and the regulating valve core, and the regulating valve core is arranged in the installation section.

[0011] The free end of the connecting rod is connected with a driving motor.

[0012] The back pressure part includes a back pressure valve core and a back pressure moving mechanism, and the back pressure valve core is connected to or isolated from the oil outlet hole of the second oil circuit through the back pressure moving mechanism;

[0013] The back-pressure moving mechanism includes a back-pressure sleeve, a back-pressure spring, a back-pressure screw and a back-pressure slider. The second end of the valve body is provided with an installation channel 2, and the installation channel 2 is arranged along the length direction of the valve body. The installation channel 2 extends to the second end face of the valve body. The first end of the back-pressure sleeve extends into the installation channel 2, and the back-pressure sleeve is fixedly installed at the second end of the installation channel 2. The back-pressure screw is spirally matched with the back-pressure sleeve. The back-pressure slider is installed at the first end of the back-pressure screw, and the two ends of the back-pressure spring are respectively abutted between the back-pressure slider and the back-pressure valve core.

[0014] The first end of the valve body is provided with a mounting hole 1 for the collecting end of the pressure sensor to extend into, the mounting hole 1 is communicated with the first oil circuit, and the mounting hole 1 is located adjacent to the oil inlet hole of the first oil circuit.

[0015] The second end of the valve body is provided with a second mounting hole for mounting the electric heating tube, and the axis of the second mounting hole is arranged side by side with the axis of the back pressure part.

[0016] The second mounting hole is arranged in the longitudinal direction, and the second mounting hole extends to the second end surface of the valve body.

[0017] After adopting the above structure, the utility model has the following beneficial effects: the utility model adopts a constant resistance part, a flow adjustment part and a back pressure part to be concentrated into a valve body, and the electric heating tube is inserted into the valve body, so that the structure is relatively compact and small in size; in this way, each part of the valve body can be heated by starting the electric heating tube, and the heating is simple, convenient, time-saving and labor-saving; and, since the electric heating tube is installed on the valve body by insertion, the electric heating tube is easy to disassemble and assemble, and the electric heating tube is not easy to be damaged, so there is no need to replace it frequently. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the regulating valve of the utility model.

[0019] Figure 2 This is a cross-sectional view of the regulating valve of the utility model (the arrow indicates the direction of fuel flow).

[0020] In the figure:

[0021] 1a-burner body; 3a-oil pump; 5a-oil tank; 6a-solenoid valve;

[0022] 100-valve body; 11-first oil circuit; 12-second oil circuit; 2-constant resistance part; 21-pressure regulating block; 22-pressure regulating spring; 23-sealing ball; 3-flow regulating part; 31-regulating valve core; 311-o-ring; 32-threaded sleeve; 33-preload spring; 34-connecting rod; 4-back pressure part; 41-back pressure valve core; 42-back pressure screw sleeve; 43-back pressure spring; 44-back pressure screw; 45-back pressure slider; 46-locking nut; 5-pressure sensor; 6-electric heating tube. DETAILED DESCRIPTION

[0023] In order to further explain the technical solution of the present utility model, the present utility model is described in detail below through specific embodiments.

[0024] The utility model relates to a regulating valve used for an oil burner, which is suitable for a conventional oil burner. The conventional oil burner comprises a burner body and an oil pump.

[0025] like Figure 1-2 As shown, it includes a valve body 100. For the convenience of description, the orientation of the valve body 100 during normal use is taken as the reference direction of the present invention, and the length direction of the valve body 100 is taken as the transverse direction, and the direction horizontally perpendicular to the transverse direction is taken as the longitudinal direction.

[0026] The valve body 100 is provided with a first oil circuit 11 and a second oil circuit 12 inside. The first oil circuit 11 is provided with an oil inlet and an oil outlet. The oil inlet of the first oil circuit 11 is connected to the oil tank through an oil pump, and the oil outlet of the first oil circuit 11 is connected to the oil inlet of the burner body. The second oil circuit 12 is an oil return circuit. The second oil circuit 12 is provided with an oil inlet and an oil outlet. The oil inlet of the second oil circuit is connected to the middle of the first oil circuit 11, and the oil outlet of the second oil circuit is connected to the oil tank. The first oil circuit 11 is located near its oil outlet. A constant resistance part 2 is installed, and the first oil circuit 11 is connected to the oil inlet hole of the second oil circuit at the oil inlet hole corresponding to the constant resistance part 2; a flow regulating part 3 and a back pressure part 4 which are connected to or disconnected from the second oil circuit 12 are installed on the valve body 100, and the flow regulating part 3 and the back pressure part 4 are arranged in sequence along the flow direction of the second oil circuit 12, and a pressure sensor 5 which is connected to the first oil circuit 11 is also installed on the valve body 100, and an electric heating tube 6 which is arranged side by side with the back pressure part is also installed on the valve body 100.

[0027] Furthermore, the first oil circuit 11 and the second oil circuit 12 are connected together through a conventional three-way valve, the three-way valve includes a first port, a second port and a third port, the first oil circuit 11 is divided into two sections, and one end of the two sections is connected to the first port and the second port respectively, and the oil inlet of the second oil circuit 12 is connected to the third port. Preferably, the first oil circuit 11 is arranged longitudinally, the front part of the second oil circuit 12 is arranged transversely, and the rear part of the second oil circuit 12 is arranged longitudinally, and the front and rear here refer to the flow direction of the oil.

[0028] Furthermore, the above-mentioned constant resistance part 2 and flow regulating part 3 are arranged in the longitudinal direction, and the above-mentioned back pressure part 4 is arranged in the transverse direction. The constant resistance part 2 is used for not opening when the oil pressure in the oil circuit is less than the resistance of the constant resistance valve 52; the function of the flow regulating part 3 is the same as that of the flow regulating valve already sold on the market, so it will not be described in detail; the back pressure part 4 is used for setting the minimum fire pressure of the burner body 1; the specific structures of the constant resistance part 2, the flow regulating part 3 and the back pressure part 4 are explained below.

[0029] Furthermore, the above-mentioned constant resistance part 2 includes a pressure regulating block 21, a pressure regulating spring 22 and a sealing ball 23. The two ends of the pressure regulating spring 22 are fixedly connected between the pressure regulating block 21 and the sealing ball 23 respectively. The pressure regulating block 21 is a hollow structure with openings at both ends. The pressure regulating block 21 is fixedly installed in the first oil circuit 11 near its oil outlet. The installation structure of the pressure regulating block 21 can be a conventional installation structure such as interference fit, clamping or threaded connection; the sealing ball 23 is arranged in the first oil circuit 11, and the sealing ball 23 is adapted to the above-mentioned first port; preferably, the pressure regulating block 21 is T-shaped to ensure the stability of the installation of the pressure regulating block 21. Preferably, at least two guide rods are connected between the above-mentioned pressure regulating block 21 and the sealing ball 23, and the pressure regulating spring 22 is sleeved outside the two guide rods to ensure the stability of the expansion and contraction of the pressure regulating spring 22.

[0030] In this way, when the fuel impact is insufficient or there is no external force, the pressure-regulating spring 22 is in a natural state, and the sealing ball 23 blocks the first port to block the first oil circuit; conversely, under the push of the fuel, the sealing ball 23 moves in the direction close to the oil outlet of the first oil circuit 11, driving the pressure-regulating spring 22 to compress, thereby connecting the first oil circuit, and connecting the first oil circuit and the second oil circuit to each other.

[0031] Furthermore, the above-mentioned flow regulating part 3 includes a regulating valve core 31 and an adjusting movable mechanism for driving the pressure regulating valve core 31. The above-mentioned valve body 100 is provided with an installation channel 1, which extends to the outer side of the valve body 100, and the installation channel 1 is arranged longitudinally. The installation channel 1 is interconnected with the second oil circuit 12, and the adjusting movable mechanism is arranged in the installation channel 1; preferably, the above-mentioned installation channel 1 is divided into a large head section and a mounting section, and the aperture of the large head section is larger than the aperture of the mounting section.

[0032] The above-mentioned regulating movement mechanism includes a threaded sleeve 32, a preload spring 33 and a connecting rod 34. The regulating valve core 31 is arranged in the second oil circuit 12. The first end of the connecting rod 34 is integrally connected to the regulating valve core 31, and the connecting rod 34 is a hollow structure with two ends open. The connecting rod 34 and the inside of the regulating valve core 31 are interconnected. The outer wall of the connecting rod 34 is provided with an external thread, and the threaded sleeve 32 is provided with an internal thread. The internal thread and the external thread are spirally matched with each other. The threaded sleeve 32 is sleeved on the connecting rod 34, and the threaded sleeve 32 is adapted to the above-mentioned large head section. The two are fixedly installed, that is, the two are installed together by conventional installation methods such as plug-in, clamping or interference fit; the two ends of the preload spring 33 are respectively abutted between the threaded sleeve 32 and the pressure regulating valve core 31. Preferably, in order to increase the sealing performance, an O-ring 311 is embedded on the outer side of the regulating valve core 31.

[0033] It is worth mentioning that, in order to adapt to conventional burners, the connecting rod 34 is connected to the output shaft of the driving motor, and the two are connected together by conventional means such as a coupling. The driving end of the driving motor is electrically connected to the signal output end of the controller in the burner so that the opening of the regulating valve core 31 of the flow regulating part 3 can be controlled by the controller.

[0034] In this way, the rotation of the connecting rod 34 causes the connecting rod 34 to move relative to the threaded sleeve 32 due to the internal thread of the threaded sleeve 32, thereby changing the opening of the regulating valve core 31 in the second oil circuit 12, that is, adjusting the fuel return amount.

[0035] Furthermore, the back pressure part 4 includes a back pressure valve core 41 and a back pressure moving mechanism. The back pressure valve core 41 is connected to or disconnected from the oil outlet of the second oil passage 12 via the back pressure moving mechanism.

[0036] A second end of the valve body 100 is provided with a transversely arranged installation channel 2, which is interconnected with the second oil circuit 12, and the installation channel 2 extends to the second end face of the valve body 100. The above-mentioned back-pressure valve core 41 is arranged at a position corresponding to the part immediately behind the second oil circuit, and a back-pressure moving mechanism is installed in the installation channel 2. The back-pressure moving mechanism includes a back-pressure screw sleeve 42, a back-pressure spring 43, a back-pressure screw 44 and a back-pressure slider 45. The back-pressure screw sleeve 42 is fixedly installed on the second end of the installation channel 2. The best back-pressure screw sleeve 42 is T-shaped, and an internal thread section is provided on the back-pressure screw sleeve 42, and an external thread section is provided on the back-pressure screw 44. The internal thread section and the external thread section are spirally matched. The back-pressure slider 45 is fixedly installed at the first end of the back-pressure screw, and the two adopt conventional installation structures such as card connection or plug-in connection, wherein the two ends of the above-mentioned back-pressure spring 43 are respectively abutted between the back-pressure valve core 41 and the back-pressure slider. Preferably, the second end of the back-pressure screw 44 is spirally connected with a locking nut 46 , which is arranged outside the back-pressure screw sleeve 42 to lock the back-pressure screw 44 , thereby realizing manual adjustment of the expansion and contraction of the back-pressure spring.

[0037] Preferably, an O-ring is embedded in the outer wall of the back pressure slider 45 for sealing.

[0038] In this way, under the impact of the fuel, the back pressure spring can move along the second end of the valve body 100, thereby driving the back pressure valve core to move in the same direction, so that the front part of the second oil circuit 12 is connected with the rear part of the second oil circuit through the back pressure valve core; on the contrary, the impact force of the fuel is insufficient or there is no external force, and the back pressure spring is reset, so that the front part of the second oil circuit 12 is separated from the rear part of the second oil circuit through the back pressure valve core.

[0039] Furthermore, the first end of the valve body 100 is provided with a transversely arranged mounting hole 1, which is located near the oil inlet of the first oil circuit 11, that is, near the second port, and the mounting hole 1 is interconnected with the first oil circuit. Preferably, in order to facilitate the installation and removal of the pressure sensor 5, the mounting hole 1 extends to the first end face of the valve body 100. In this way, the pressure sensor 5 is installed in the mounting hole 1, and the sampling end of the pressure sensor 5 corresponds to the inside of the first oil circuit 11, so that it can detect the oil pressure in the oil circuit.

[0040] Furthermore, the second end of the above-mentioned valve body 100 is provided with a second mounting hole, which is arranged horizontally, and the axis of the second mounting hole is arranged side by side with the above-mentioned second mounting channel, and the two are arranged close to each other, and the electric heating tube 6 is inserted into the second mounting hole; preferably, in order to facilitate the loading and unloading of the electric heating tube 6, the second mounting hole extends to the second end face of the valve body 100.

[0041] It is worth mentioning that the above-mentioned electric heating tube 6 is an existing conventional electric heating tube, which is electrically connected to the power supply end of the controller in a conventional manner so that the electric heating tube can be turned on and off by the controller.

[0042] The present embodiment is a regulating valve for a burner. When the electric heating tube is working, the electric heating tube heats the fuel in the valve body 100 through heat transfer. Since the constant resistance part 2, the flow regulating part and the back pressure part are gathered in the valve body 100, the pressure sensor on the valve body 100 detects the heated fuel, thereby ensuring that the valve body has a compact structure and a small size, and the electric heating tube is easy and simple to install.

[0043] The above is only a preferred embodiment of the present invention, and all equivalent changes and modifications made within the scope of the claims of the present utility model shall fall within the scope of the claims of the present utility model.

Claims

1. A regulating valve for a burner, characterized in that: The invention comprises a valve body, wherein a first oil circuit and a second oil circuit are provided inside the valve body, a constant resistance part is installed near the oil outlet of the first oil circuit, the first oil circuit is connected to the oil inlet of the second oil circuit at the oil inlet corresponding to the constant resistance part, a flow regulating part and a back pressure part which are interconnected or disconnected with the second oil circuit are installed on the valve body, the flow regulating part and the back pressure part are arranged in sequence along the flow direction of the second oil circuit, a pressure sensor which is connected with the first oil circuit is installed on the valve body, an electric heating pipe is also installed on the valve body, and the electric heating pipe is arranged side by side with the back pressure part.

2. A regulating valve for a burner according to claim 1, characterized in that: The first oil circuit and the second oil circuit are connected together through a three-way valve, and the three-way valve includes a first port, a second port, and a third port that are integrally connected.

3. A regulating valve for a burner according to claim 2, characterized in that: The length direction of the valve body is taken as the transverse direction, and the direction horizontally perpendicular to the transverse direction is taken as the longitudinal direction. The constant resistance part and the flow regulating part are both arranged in the longitudinal direction, and the back pressure part is arranged in the transverse direction.

4. A regulating valve for a burner according to claim 3, characterized in that: The constant resistance part includes a pressure regulating block, a pressure regulating spring and a sealing ball, the two ends of the pressure regulating spring are respectively connected to the pressure regulating block and the sealing ball, the pressure regulating block is fixedly installed in the first oil circuit near its oil outlet, and the pressure regulating block is a hollow structure with openings at both ends, the sealing ball is arranged in the first oil circuit, and the sealing ball is adapted to the first port.

5. The regulating valve for a burner according to claim 4, characterized in that: The flow regulating part includes a regulating valve core and an regulating movement mechanism for driving the regulating valve core to move, the regulating movement mechanism includes a threaded sleeve, a preload spring and a connecting rod connected to the regulating valve core, an installation channel 1 is provided on the valve body, the installation channel 1 is communicated with the second oil circuit, the installation channel 1 is divided into a large head section and an installation section, the threaded sleeve is fixedly installed in the large head section, a threaded section adapted to the threaded sleeve is provided on the connecting rod, two ends of the preload spring are respectively abutted between the threaded sleeve and the regulating valve core, and the regulating valve core is arranged in the installation section.

6. A regulating valve for a burner according to claim 5, characterized in that: The free end of the connecting rod is connected with a driving motor.

7. The regulating valve for a burner according to claim 5, characterized in that: The back pressure part includes a back pressure valve core and a back pressure moving mechanism, and the back pressure valve core is connected to or isolated from the oil outlet hole of the second oil circuit through the back pressure moving mechanism; The back-pressure moving mechanism includes a back-pressure sleeve, a back-pressure spring, a back-pressure screw and a back-pressure slider. The second end of the valve body is provided with an installation channel 2, and the installation channel 2 is arranged along the length direction of the valve body. The installation channel 2 extends to the second end face of the valve body. The first end of the back-pressure sleeve extends into the installation channel 2, and the back-pressure sleeve is fixedly installed at the second end of the installation channel 2. The back-pressure screw is spirally matched with the back-pressure sleeve. The back-pressure slider is installed at the first end of the back-pressure screw, and the two ends of the back-pressure spring are respectively abutted between the back-pressure slider and the back-pressure valve core.

8. A regulating valve for a burner according to any one of claims 1 to 7, characterized in that: The first end of the valve body is provided with a mounting hole 1 for the collecting end of the pressure sensor to extend into, the mounting hole 1 is communicated with the first oil circuit, and the mounting hole 1 is located adjacent to the oil inlet hole of the first oil circuit.

9. A regulating valve for a burner according to any one of claims 1 to 7, characterized in that: A second mounting hole for mounting the electric heating tube is formed at the second end of the valve body, and the axis of the second mounting hole is arranged side by side with the axis of the back pressure portion.

10. A regulating valve for a burner according to claim 9, characterized in that: The second mounting hole is arranged in the longitudinal direction, and the second mounting hole extends to the second end surface of the valve body.

Images