Adjustable spraying device for temperature reduction device and temperature reduction method

Abstract

The invention discloses an adjustable spraying device for a temperature reducing device and a cooling method, the adjustable spraying device comprises a steam circulating pipe, a cooling water conveying pipe and a spraying device, the liquid outlet end of the cooling water conveying pipe extends into the steam circulating pipe, and the spraying device is connected to the liquid outlet end of the cooling water conveying pipe in a sleeving mode; the spraying device comprises an annular nozzle, a drainage cap and a stroke cylinder, the annular nozzle is fixedly arranged on the inner wall of the liquid outlet end of the cooling water conveying pipe in a sleeving mode, an annular water pressure bin is formed between the waist of the drainage cap and the inner wall of the annular nozzle, and the drainage cap is coaxially and movably matched with the spraying end of the annular nozzle; an annular spraying gap is formed between the drainage cap and the inner ring of the spraying end of the annular nozzle, one end of the stroke cylinder movably sleeves the outer side of a guide cylinder coaxially and integrally connected with the side, away from the spraying end, of the annular nozzle, and the drainage cap is synchronously connected with the stroke cylinder through a center rod. Hot steam in the steam circulating pipe can be rapidly cooled, and the jet flow of the annular nozzle can be adjusted according to the optimal temperature needed by the production working condition.

Description

Technical Field

[0001] The invention belongs to the field of boiler thermal system equipment, and more specifically relates to an adjustable injection device for a temperature reduction device and a temperature reduction method. Background Art

[0002] In some industrial production workshops that use boilers, when the production needs of the workshop change, the temperature demand for the boiler will change accordingly. Therefore, it is necessary to quickly stabilize the temperature changes in the steam pipe. However, the injection direction of the traditional cooler nozzle intersects with the steam flow direction, and the injection flow rate is fixed. When the temperature is too high, it cannot provide enough coolant to effectively reduce the temperature; when the temperature is too low, it leads to excessive cooling, resulting in energy waste and possible equipment damage. Summary of the invention

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides an adjustable injection device and a cooling method for a cooling device. The injection direction of the annular nozzle is opposite to the steam flow direction, so that the cooling water can quickly cool the hot steam in the steam circulation pipe, and the injection flow of the annular nozzle can be adjusted according to the optimal temperature required by the production conditions, which can protect the equipment from damage and reduce resource waste.

[0004] Technical solution: To achieve the above-mentioned purpose, an adjustable injection device and a cooling method for a cooling device of the present invention include a steam circulation pipe, a cooling water delivery pipe and an injection device, the liquid outlet end of the cooling water delivery pipe extends into the steam circulation pipe, and the injection device is sleeved on the liquid outlet end of the cooling water delivery pipe; the injection device includes an annular nozzle, a drainage cap and a stroke cylinder, the annular nozzle is fixedly sleeved on the inner wall of the liquid outlet end of the cooling water delivery pipe, an annular water pressure chamber is formed between the waist of the drainage cap and the inner wall of the annular nozzle, the drainage cap is coaxially movably matched with the injection end of the annular nozzle, an annular injection gap is formed between the drainage cap and the inner circle of the injection end of the annular nozzle, one end of the stroke cylinder is movably sleeved on the outer side of the guide cylinder coaxially connected to the side of the annular nozzle away from the injection end, and the drainage cap is synchronously connected to the stroke cylinder through a center rod; it also includes a spring, the spring applies a force on the stroke cylinder away from the injection direction; a stroke gap is formed between one end of the stroke cylinder and the annular nozzle, and the annular injection gap is in a closed state under the action of the spring under normal conditions.

[0005] Furthermore, a plurality of cooling water channels are arranged in a circumferential array on one side of the annular nozzle away from the injection end, each cooling water channel is connected to the annular water pressure chamber, and the annular injection gap is connected to the annular water pressure chamber.

[0006] Furthermore, the guide cylinder and the annular nozzle are integrally arranged coaxially, and a travel gap of a reserved length is provided between the guide cylinder and the annular nozzle, and the travel gap can control the maximum width of the annular injection gap.

[0007] Furthermore, one end of the stroke cylinder away from the annular injection gap is integrally connected with a cone, an internal threaded hole is opened on the cone, the internal threaded hole is coaxially arranged with the stroke cylinder, and the end of the center rod away from the annular injection gap is provided with an external thread that cooperates with the internal threaded hole. In the assembled state, the end of the center rod away from the annular injection gap cooperates with the stroke cylinder thread.

[0008] Furthermore, one end of the spring is connected to the end surface of the cone close to the annular injection gap, and the other end abuts against the end surface of the guide tube away from the annular injection gap. The lower end of the spring forms a downward thrust on the cone.

[0009] Furthermore, it also includes a connecting pin, an outer pin hole matching with the connecting pin is arranged on the cone, and an inner pin hole matching with the connecting pin is arranged at the lower end of the center rod; in the assembled state, the inner pin hole and the outer pin hole together constitute a connecting pin locking channel, and the connecting pin passes through and is locked in the connecting pin locking channel.

[0010] Furthermore, a pressure sensor is provided at one end of the drainage cap away from the center rod, and a first temperature detector and a second temperature detector are sequentially provided on the steam circulation pipe along the steam circulation direction, and the cooling water delivery pipe is located between the first temperature detector and the second temperature detector; a pressurizing device is provided in the cooling water delivery pipe, and the first temperature detector and the second hot liquid detector are both electrically connected to the pressurizing device.

[0011] Furthermore, a cooling method of an adjustable injection device for a cooling device is provided: when the hot steam in a heating device such as a boiler enters the steam circulation pipe in the desuperheater, it is assumed that in a critical state, there is no force between the guide cap and the injection end of the annular nozzle, and the cooling water in the cooling water delivery pipe cannot be injected into the steam circulation pipe through the annular nozzle; when the production conditions change, the temperature of the hot steam generated by the heating device such as the boiler rises, and a first temperature detector detects the temperature of the hot steam in the steam circulation pipe at this time; a pressure sensor is arranged at one end of the guide cap away from the annular nozzle to detect the impact pressure of the hot steam in the steam circulation pipe on the impact bearing surface on the guide cap at this time; the control system makes a comparison between the temperature and pressure detected and the temperature and pressure of the hot steam in the steam circulation pipe at the critical state. By contrast, the control system then controls the boosting device to increase the pressure in the cooling water delivery pipe, so that the force of the cooling water in the cold water delivery pipe on the injection device along the injection direction is greater than the force of the spring and the hot steam in the steam circulation pipe on the injection device in the opposite direction, so that the width of the annular injection gap becomes larger, so that the cooling water in the cooling water delivery pipe can flow into the annular water pressure bin from each cooling water channel, and spray a conical cooling water jet into the steam circulation pipe through the annular injection gap with the increased width. The conical cooling water jet is entrained by the hot steam airflow in the steam circulation pipe to form cooling water mist, so that the cooling water can quickly neutralize the hot steam in the steam circulation pipe, thereby reducing the temperature of the hot steam in the steam circulation pipe.

[0012] Beneficial effects: The adjustable injection device and cooling method for a cooling device of the present invention align the injection direction of the annular nozzle with the steam circulation direction, so that the cooling water can quickly cool down the hot steam in the steam circulation pipe, and can adjust the injection flow of the annular nozzle according to the optimal temperature required by the production conditions, thereby protecting the equipment from damage and reducing resource waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A schematic diagram of an application scenario of an adjustable injection device for a temperature reduction device of the present invention;

[0014] Figure 2 The present invention is a schematic diagram of the structure of an adjustable injection device for a cooling device. DETAILED DESCRIPTION

[0015] The present invention will be further described below in conjunction with the accompanying drawings.

[0016] As attached Figure 1 and 2As shown, an adjustable injection device for a temperature reduction device and a temperature reduction method, comprising a steam circulation pipe 14, a cooling water delivery pipe 13 and an injection device 25, the liquid outlet end of the cooling water delivery pipe 13 extends into the steam circulation pipe 14, and the injection device 25 is sleeved on the liquid outlet end of the cooling water delivery pipe 13; the injection device 25 comprises an annular nozzle 1, a drainage cap 3 and a stroke cylinder 2, the annular nozzle 1 is fixedly sleeved on the inner wall of the liquid outlet end of the cooling water delivery pipe 13, an annular water pressure chamber 7 is formed between the waist of the drainage cap 3 and the inner wall of the annular nozzle 1, the drainage cap 3 is coaxially movably matched with the injection end of the annular nozzle 1, and the drainage cap 3 and the annular nozzle are movably matched. An annular injection gap 8 is formed between the inner circles of the injection end of the nozzle 1, and the water pressure in the annular water pressure chamber 7 can drive the drainage cap 3 to move along the axial direction, thereby increasing the width of the annular injection gap 8; one end of the stroke cylinder 2 is movably sleeved on the outer side of the guide cylinder 16 which is coaxially connected to the side of the annular nozzle 1 away from the injection end, and the drainage cap 3 is synchronously connected to the stroke cylinder 2 through the center rod 18; it also includes a spring 5, and the spring 5 applies a force on the stroke cylinder 2 away from the injection direction; a stroke gap is formed between one end of the stroke cylinder 2 and the annular nozzle 1, and under normal conditions, the annular injection gap 8 is in a closed state under the action of the spring 5.

[0017] A plurality of cooling water channels 6 are arranged in a circumferential array on one side of the annular nozzle 1 away from the injection end, each cooling water channel 6 is connected to the annular water pressure chamber 7, and the annular injection gap 8 is connected to the annular water pressure chamber 7. The cooling water in the cooling water delivery pipe 13 flows into the annular water pressure chamber 7 through the plurality of cooling water channels 6. When the liquid in the annular water pressure chamber 7 is applied to the drainage cap 3, and the force in the injection direction of the annular nozzle 1 is greater than the force applied by the spring and the external force on the drainage cap 3, and is opposite to the injection direction of the annular nozzle 1, the annular injection gap 8 is in a flow state; Figure 2 As shown, the annular nozzle 1 is embedded and installed at the liquid outlet end of the cooling water delivery pipe 13, and the liquid outlet end of the cooling water delivery pipe 13 is connected to the interior of the steam circulation pipe 14. When the steam circulation pipe 14 is filled with hot steam, the water vapor in the steam circulation pipe 14 has a pressure on the top of the drainage cap 3 in the opposite direction of the injection direction of the annular nozzle 1. When the cooling water in the annular water pressure chamber 7 acts on the drainage cap 3 along the injection direction of the annular nozzle 1, the force exceeds the force of the spring and the hot steam in the steam circulation pipe 14 acting on the drainage cap 3 in the opposite direction of the injection direction of the annular nozzle 1, the annular injection gap 8 opens and sprays a conical cooling water jet into the steam circulation pipe 14. The conical cooling water jet forms cooling water mist under the entrainment of the hot steam airflow in the steam circulation pipe 14, and thermally neutralizes with the hot steam in the steam circulation pipe 14, thereby reducing the temperature of the hot steam in the steam circulation pipe 14.

[0018] The guide cylinder 16 is coaxially arranged with the annular nozzle 1, and a travel gap 15 of a reserved length is provided between the guide cylinder 16 and the annular nozzle 1, and the travel gap 15 can control the maximum width of the annular injection gap 8; when the travel cylinder 2 moves upward along the axial direction to the maximum stroke, the upper end of the travel cylinder 2 abuts against the lower side of the annular nozzle 1, and at this time the width of the annular injection gap 8 is at its maximum value. By changing the width of the travel gap 15, the maximum opening degree of the annular injection gap 8 can be adjusted, thereby achieving the purpose of adjusting the maximum injection flow rate of the annular nozzle 1.

[0019] The end of the stroke cylinder 2 away from the annular injection gap 8 is integrally connected with a cone 17, and an internal threaded hole 12 is opened on the cone 17. The conical surface at the lower end of the cone 17 has a diversion function, which can make the cooling water in the cooling water delivery pipe 13 flow into the annular water pressure chamber 7 more quickly through each cooling water channel 6; the internal threaded hole 12 is coaxially arranged with the stroke cylinder 2, and the end of the center rod 18 close to the annular injection gap 8 is integrally connected with the end of the nozzle valve core 3 away from the annular injection gap 8, and the end of the center rod 18 away from the annular injection gap 8 is provided with an external thread that matches the internal threaded hole 12 thread; a first through hole 11 is coaxially opened on the annular nozzle 1, and a second through hole 9 is coaxially opened on the guide cylinder 16. The end of the center rod 18 away from the annular injection gap 8 passes through the first through hole 11 and the second through hole 9 at the same time and is connected to the stroke cylinder 2; the spring is arranged between the outer wall of the center rod 18 and the inner wall of the stroke cylinder 2; and one end of the spring 5 is connected to the end face of the cone 17 close to the annular injection gap 8, and the other end abuts against the end face of the guide cylinder 16 away from the annular injection gap 8; thereby making the assembly process more convenient; under normal conditions, the spring 5 is in a compressed state. When the pressure in the annular water pressure chamber 7 changes, the spring 5 can cooperate with the thread between the external thread at the lower end of the center rod 18 and the internal threaded hole 12 on the cone 17, so that the stroke cylinder 2 and the drainage cap 3 can move simultaneously along the axial direction relative to the annular nozzle 1.

[0020] When the pressure in the annular hydraulic chamber 7 changes, the compression degree of the spring 5 changes accordingly, thereby changing the length of the spring 5. When the length of the spring 5 becomes shorter, the liquid in the annular hydraulic chamber 7 is applied to the drainage cap 3, and the force along the injection direction of the annular nozzle 1 causes the lower end of the drainage cap 3 to cooperate with the external thread and the internal thread hole 12, driving the stroke cylinder 2 and the drainage cap 3 to move upward along the axial direction relative to the annular nozzle 1 at the same time, so that the annular injection gap 8 is in a flow state; when the length of the spring 5 becomes longer, the spring 5 is applied to the stroke cylinder 2, and the force opposite to the injection direction of the annular nozzle 1 causes the stroke cylinder 2 to cooperate with the external thread and the internal thread hole 12, driving the drainage cap 3 and the stroke cylinder 2 to move downward along the axial direction relative to the annular nozzle 1 at the same time, until the annular injection gap 8 is in a closed state.

[0021] It also includes a connecting pin 4, the cone 17 is provided with an outer pin hole 24 that matches the connecting pin 4, and the lower end of the center rod 18 is provided with an inner pin hole 23 that matches the connecting pin 4; in the assembled state, the inner pin hole 23 and the outer pin hole 24 together constitute a connecting pin locking channel 22, and the connecting pin 4 passes through and is locked in the connecting pin locking channel 22; the inner pin hole 23 passes through the area where the outer thread is opened at the lower end of the center rod 18, and the axial diameter of the inner pin hole 23 is perpendicular to the axial diameter of the center rod 18; the outer pin hole 24 passes through the cone 17, and the outer pin hole 24 is located in the area where the inner thread hole 12 on the cone 17 is located, and the outer pin hole The axial diameter of 24 is perpendicular to the axis of the cone 17; in the process of threaded matching between the external thread at the lower end of the center rod 18 and the internal threaded hole 12 on the cone 17, when the axes of the inner pin hole 23 and the outer pin hole 24 are in the same straight line, the inner pin hole 23 and the outer pin hole 24 together constitute a connecting pin locking channel 22. At this time, one end of the connecting pin 4 is pushed to the other end of the outer pin hole 24 through one end of the outer pin hole 24, so that the connecting pin 4 passes through and is locked in the connecting pin locking channel 22, so that the center rod 18 can be connected with the cone 17 together, so that the force transmission between the stroke cylinder 2 and the drainage cap 3 can be completed through the connecting pin 4.

[0022] A pressure sensor 27 is provided at one end of the drainage cap 3 away from the center rod 18, and a first temperature detector 19 and a second temperature detector 20 are sequentially provided on the steam circulation pipe 14 along the steam circulation direction, and the cooling water delivery pipe 13 is located between the first temperature detector 19 and the second temperature detector 20; a pressurizing device 21 is provided in the cooling water delivery pipe 13, and the first temperature detector 19 and the second hot liquid detector 20 are both electrically connected to the pressurizing device 21.

[0023] Assume that the plane of the guide cap 3 away from the annular nozzle 1 is the impact bearing surface 26, and the area of ​​the impact bearing surface 26 is S; Assume that the detection pressure of the pressure sensor 27 in the critical state is P 1 The wind pressure on the impact bearing surface 26 is P 1 *S, the pressure added by the booster 21 to the cooling water delivery pipe 13 is Pa 1 The water pressure along the axial direction of the integral structure composed of the guide cap 3, the center rod 18, the stroke cylinder 2 and the cone 17 is approximately Pa*S, and the detection temperature of the first temperature detector 19 is T 1 ; Let the compression amount of the length of spring 5 at this time compared with the length of spring 5 in the non-compressed state be △h 1 , then the guide cap 3 is subjected to the elastic force k△h from the spring 5 1 At this time, the guide cap 3 maintains balance under the combined effect of the elastic force k△h of the spring 5, the pressure of the cooling water in the cooling water delivery pipe 13 and the wind pressure on the impact bearing surface 26, so at this time P 1*S+k△h 1 =Pa 1 *S, and in this state, there is no force between the guide cap 3 and the injection end of the annular nozzle 1, and the cooling water in the cooling water delivery pipe 13 just cannot be injected into the steam circulation pipe 14 through the annular nozzle 1;

[0024] On the basis of the above, when the temperature detected by the first temperature detector 19 rises, the temperature at this time is recorded as T 2 At this time, the cooling water in the cooling water delivery pipe 13 needs to be sprayed into the steam circulation pipe 14 through the injection end of the annular nozzle 1 to prevent the steam circulation pipe 14 from bursting due to excessive temperature. Therefore, it is necessary to increase the pressure added by the booster 21 in the cooling water delivery pipe 13; Assume T 2 -T 1 =△T, the pressure increased by the booster 21 is P 增 , then △T and P 增 There is a linear relationship between them, that is, each △T has a corresponding P 增 , the larger △T is, the higher P 增 The larger the P 增 The larger the value is, the greater the force exerted on the guide cap 3 by the cooling water in the cooling water delivery pipe 13 passing through the cooling water channels 6 and flowing into the pressure chamber 7, and the greater the contraction degree of the spring 5, so that the width of the annular injection gap 8 is increased, and more cooling water in the cooling water delivery pipe 13 is injected from the annular injection gap 8 into the steam circulation pipe 14 to fully cool down the heated hot steam.

[0025] On the basis of the above, since the hot steam in the steam circulation pipe 14 has a force on the guide cap 3, the greater the flow rate of the hot steam in the steam circulation pipe 14, the greater the pressure detected by the pressure sensor 27; after the flow rate of the steam circulation pipe 14 increases, if the annular injection gap 8 still injects cooling water with a fixed width, it is impossible to fully dissipate the heat of the hot steam in the steam circulation pipe 14. Therefore, when the pressure detected by the pressure sensor 27 increases, it is necessary to increase the width of the annular injection gap 8, so that more cooling water is injected into the steam circulation pipe 14, and the hot steam with increased flow rate is fully dissipated; the pressure detected by the pressure sensor 27 is assumed to be P 1 Increase to P 2 , then the pressure increased by the booster 21 needs to be increased from Pa 1 Increase to Pa2, let P 2 -P 1 =△P,Pa 1-Pa2=△Pa, the effective pressure of the boost device 21 on the injection device 25 is (△Pa-△P), then there is a linear relationship between △P and (△Pa-△P), that is, each △P has a corresponding (△Pa-△P), the larger the △P, the larger the △Pa; the larger the △Pa, the greater the force of the cooling water in the cooling water delivery pipe 13 that passes through the cooling water channels 6 and flows into the pressure chamber 7 on the guide cap 3, the greater the contraction degree of the spring 5, and the larger the width of the annular injection gap 8, and then more cooling water in the cooling water delivery pipe 13 is sprayed from the annular injection gap 8 to the steam circulation pipe 14 to comprehensively cool the hot steam with increased flow rate.

[0026] A cooling method for an adjustable injection device used in a cooling device, when hot steam in a heating device such as a boiler enters a steam circulation pipe 14 in a desuperheater, a first temperature detector 19 detects the temperature of the hot steam in the steam circulation pipe 14 at this time, and transmits the detected temperature data to a control system; a pressure sensor 27 arranged at one end of a drainage cap 3 away from an annular nozzle detects the impact pressure of the hot steam in the steam circulation pipe 14 on an impact bearing surface 26 on the drainage cap 3 at this time, and transmits the detected pressure data to a control system; the control system detects the temperature detected by the first temperature detector 19 and the pressure detected by the pressure sensor 27, and the steam circulation pipe 14 at a critical state. The temperature and pressure of the hot steam in the cooling water delivery pipe are compared, and then the control system controls the booster device 21 to increase the pressure in the cooling water delivery pipe 13, so that the force of the cooling water in the cooling water delivery pipe 13 on the injection device 25 along the injection direction is greater than the force of the spring 5 and the hot steam in the steam circulation pipe 14 on the injection device 25 in the opposite direction, so that the width of the annular injection gap 8 is increased, so that the cooling water in the cooling water delivery pipe 13 can flow into the annular water pressure tank 7 from each cooling water channel 6, and spray a conical cooling water jet into the steam circulation pipe 14 through the annular injection gap 8 with the increased width. The conical cooling water jet is in the hot steam airflow in the steam circulation pipe 14. Under the entrainment effect, cooling water mist is formed, so that the cooling water can quickly neutralize the heat with the hot steam in the steam circulation pipe 14, thereby reducing the temperature of the hot steam in the steam circulation pipe 14. The steam after cooling in the steam circulation pipe 14 flows along the circulation direction of the steam circulation pipe 14 to the position of the second temperature detector 20. The second temperature detector 20 detects the temperature of the steam after cooling in the steam circulation pipe 14 and transmits the detected pressure data to the control system. The control system compares the temperature detected by the second temperature detector 20 with the temperature set under the normal working condition of the desuperheater. If the temperature detected by the second temperature detector 20 is greater than the temperature set under the normal working condition of the desuperheater, the control system will detect the temperature detected by the second temperature detector 20. If the temperature detected by the second temperature detector 20 is lower than the set temperature under normal working condition of the desuperheater, the control system controls the boosting device 21 to reduce the pressure added to the cooling water delivery pipe 13; thereby, the cooling water in the cooling water delivery pipe 13 can flow from the cooling water channel 6 on the annular nozzle 1 into the swirl annular water pressure tank 7 at the most suitable flow rate, and spray a conical cooling water jet into the steam circulation pipe 14 through the annular injection gap 8, thereby ensuring that no matter what working condition is, the temperature of the hot steam in the steam circulation pipe 14 is within the normal temperature range under this working condition.

[0027] The above are preferred embodiments of the present invention. It should be pointed out that a person skilled in the art may make several improvements and modifications without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the protection scope of the present invention.

Claims

1. An adjustable spray device for a temperature reduction device, characterized in that: The invention comprises a steam circulation pipe (14), a cooling water delivery pipe (13) and an injection device (25), wherein the liquid outlet end of the cooling water delivery pipe (13) extends into the steam circulation pipe (14), and the injection device (25) is sleeved on the liquid outlet end of the cooling water delivery pipe (13); the injection device (25) comprises an annular nozzle (1), a drainage cap (3) and a stroke cylinder (2), wherein the annular nozzle (1) is fixedly sleeved on the inner wall of the liquid outlet end of the cooling water delivery pipe (13), an annular water pressure chamber (7) is formed between the waist of the drainage cap (3) and the inner wall of the annular nozzle (1), and the drainage cap (3) is coaxially movably matched with the spray end of the annular nozzle (1). The invention relates to a nozzle assembly comprising a nozzle (1) and a guide tube (1) having a plurality of guide tubes (2) connected to the nozzle end. The nozzle (1) has a plurality of guide tubes (16) connected to the nozzle end. The nozzle (1) has a plurality of guide tubes (16) connected to the nozzle end. The guide tubes (3) are ...

2. The adjustable injection device for a temperature reduction device according to claim 1, characterized in that: A plurality of cooling water channels (6) are arranged in a circumferential array on one side of the annular nozzle (1) away from the spray end, each of the cooling water channels (6) is connected to an annular water pressure chamber (7), and the annular spray gap (8) is connected to the annular water pressure chamber (7).

3. The adjustable injection device for a temperature reduction device according to claim 1, characterized in that: The guide cylinder (16) is coaxially arranged with the annular nozzle (1), and a travel gap (15) of a reserved length is provided between the guide cylinder (16) and the annular nozzle (1). The travel gap (15) can control the maximum width of the annular injection gap (8).

4. The adjustable injection device for a temperature reduction device according to claim 1, characterized in that: The end of the stroke cylinder (2) away from the annular injection gap (8) is integrally connected with a cone (17), and an internal threaded hole (12) is formed on the cone (17). The internal threaded hole (12) is coaxially arranged with the stroke cylinder (2). The end of the center rod (18) away from the annular injection gap (8) is provided with an external thread that is threadably matched with the internal threaded hole (12). In the assembled state, the end of the center rod (18) away from the annular injection gap (8) is threadably matched with the stroke cylinder (2).

5. The adjustable injection device for a temperature reduction device according to claim 1, characterized in that: One end of the spring (5) is connected to the end surface of the cone (17) close to the annular injection gap (8), and the other end of the spring (5) is in contact with the end surface of the guide tube (16) away from the annular injection gap (8). The lower end of the spring (5) forms a downward thrust on the cone (17).

6. The adjustable spray device for a temperature reduction device according to claim 1, characterized in that: It also includes a connecting pin (4), the cone (17) is provided with an outer pin hole (24) matching with the connecting pin (4), and the lower end of the center rod (18) is provided with an inner pin hole (23) matching with the connecting pin (4); in the assembled state, the inner pin hole (23) and the outer pin hole (24) together constitute a connecting pin locking channel (22), and the connecting pin (4) passes through and is locked in the connecting pin locking channel (22).

7. The adjustable spray device for a temperature reduction device according to claim 1, characterized in that: A pressure sensor (27) is provided at one end of the drainage cap (3) away from the central rod (18); a first temperature detector (19) and a second temperature detector (20) are provided in sequence on the steam circulation pipe (14) along the steam circulation direction, and the cooling water delivery pipe (13) is located between the first temperature detector (19) and the second temperature detector (20); a pressurizing device (21) is provided in the cooling water delivery pipe (13), and the first temperature detector (19) and the second hot liquid detector (20) are both electrically connected to the pressurizing device (21).

8. The cooling method of the adjustable spray device for a cooling device according to claim 1, characterized in that: When hot steam in a heating device such as a boiler enters the steam circulation pipe (14) in the desuperheater, it is assumed that in a critical state, there is no force between the guide cap (3) and the injection end of the annular nozzle (1), and the cooling water in the cooling water delivery pipe (13) cannot be injected into the steam circulation pipe (14) through the annular nozzle (1); when the production conditions change, the temperature of the hot steam generated by the boiler or other heating device rises, and the first temperature detector (19) detects the temperature of the hot steam in the steam circulation pipe (14) at this time; the pressure sensor (27) arranged at the end of the guide cap (3) away from the annular nozzle detects the impact pressure of the hot steam in the steam circulation pipe (14) on the impact bearing surface (26) on the guide cap (3) at this time; the control system compares the detected temperature and pressure with the temperature and pressure of the hot steam in the steam circulation pipe (14) at the critical state, and then controls the boosting device ( 21) increasing the pressure in the cooling water delivery pipe 13, so that the force of the cooling water in the cold water delivery pipe (13) on the injection device (25) in the injection direction is greater than the force of the spring (5) and the hot steam in the steam circulation pipe (14) on the injection device (25) in the opposite direction, so that the width of the annular injection gap (8) becomes larger, so that the cooling water in the cooling water delivery pipe (13) can flow from each cooling water channel (6) into the annular water pressure chamber (7), and spray a conical cooling water jet into the steam circulation pipe (14) through the annular injection gap (8) with the increased width. The conical cooling water jet forms cooling water mist under the entrainment of the hot steam airflow in the steam circulation pipe (14), so that the cooling water can quickly be thermally neutralized with the hot steam in the steam circulation pipe (14), thereby reducing the temperature of the hot steam in the steam circulation pipe (14).

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