Water hammer eliminating system for return water of drying machine

Abstract

The utility model provides a return water hammer eliminating system for a dryer, which belongs to the technical field of food processing equipment and comprises a heat exchanger, a steam trap, a pressure regulating tank, an air pump and a water pump. The air pump injects or releases air into the pressure regulating tank to further regulate the air pressure in the pressure regulating tank, and then pressure fluctuation in the water inlet pipe and the water return pipe is absorbed. According to the return water hammer eliminating system of the drying machine, condensate water formed after high-temperature steam passes through the steam trap enters the pressure regulating tank through the water inlet pipe under the action of the water pump and then is discharged into the water return pipe. When the water pump is started or closed, the pressure in the water inlet pipe and the water return pipe changes, at the moment, the air pump injects or releases gas into the pressure regulating tank according to the pressure change in the pressure regulating tank, then the pressure fluctuation in the water inlet pipe and the water return pipe is absorbed, and the pressure in the water inlet pipe and the pressure in the recovery pipe are kept constant; therefore, the water hammer phenomenon of the condensate water is avoided, and the service life of the pipeline is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to food processing equipment technical field, more specifically, relate to a drying -machine backwater water hammer elimination system. BACKGROUND

[0002] Food drying machine is a kind of equipment specially used for removing moisture in food, and the humidity of material is reduced by heat energy or other technical means, to prolong shelf life, facilitate storage or meet further processing needs. Drying machine is the core equipment in instant noodle production line, is used to the noodle after steaming or frying Rapid dehydration and shaping, ensure the rehydration, taste and shelf life of finished product. The steam of drying machine enters the heat exchanger, enters the trap after heat conduction, the trap can automatically discharge the condensate to the backwater pipe, and the condensate forms high backwater in the backwater pipeline, thereby causing water hammer. Condensate water hammer can cause frequent cracking and damage of pipeline, and there is a safety hazard. UTILITY MODEL CONTENT

[0003] The utility model discloses a drying -machine backwater water hammer elimination system, and aims at solving the problem that the existing food drying machine exists condensate water and causes water hammer phenomenon due to high backwater, causes frequent cracking and damage of pipeline.

[0004] To achieve the above object, the utility model adopts the technical scheme of providing a drying -machine backwater water hammer elimination system, comprising: heat exchanger, trap, pressure tank, air pump and water pump;The heat exchanger and the trap are sequentially installed on the steam pipeline, the trap and the pressure tank are connected by water inlet pipe, the air pump is fixedly installed on the top of the pressure tank, the water outlet end of the pressure tank is installed with backwater pipe, and the water pump is installed on the water inlet pipe;The air pump injects or releases gas into the pressure tank, and then adjusts the air pressure in the pressure tank, and then absorbs the pressure fluctuation in the water inlet pipe and the backwater pipe.

[0005] In a possible implementation manner, a slow-closing check valve is installed on the water pump.

[0006] In a possible implementation manner, a pressure reducing valve is installed on the water inlet pipe, and the pressure reducing valve is located at one end of the water inlet pipe close to the trap.

[0007] In a possible implementation, a support seat is fixedly installed on the inner side wall of the pressure regulating tank, a guide rod is fixedly installed on the support seat, the guide rod extends into the water return pipe and is parallel to the length direction of the water return pipe, two buffer discs are slidingly installed on the guide rod, water holes for water flow are formed in the buffer discs, the two buffer discs are connected by elastic members, the elastic members apply opposite forces to the two buffer discs, and a limiting member is fixedly installed on the guide rod and located on the side away from the two buffer discs.

[0008] In a possible implementation, the support seat comprises a support ring and a support rod, the support ring is fixedly installed on the inner side wall of the pressure regulating tank by fasteners, the inner diameter of the support ring is greater than the diameter of the water outlet of the pressure regulating tank, and the support rod is fixedly installed on the inner side of the support ring.

[0009] In a possible implementation, the guide rod is sequentially connected by a plurality of connecting rods, adjacent connecting rods are connected by sleeves, and the connecting rods and the sleeves are connected by threads.

[0010] In a possible implementation, the elastic member is a compression spring, and the compression spring is sleeved on the guide rod.

[0011] In a possible implementation, annular grooves for positioning the compression spring are arranged on the opposite side walls of the two buffer discs.

[0012] In a possible implementation, the limiting member is a check ring.

[0013] In a possible implementation, brushes are arranged on the outer circumferences of the buffer discs, and the brushes are in contact with the inner wall of the water return pipe.

[0014] Compared with the prior art, the system for eliminating water hammer of a water return pipe of a dryer is provided, and the condensed water formed after high-temperature steam passes through the trap is introduced into the pressure regulating tank through the water inlet pipe under the action of the water pump and then is discharged into the water return pipe. When the water pump is started or stopped, the pressure in the water inlet pipe and the water return pipe changes, at this time, the air pump injects or releases gas into the pressure regulating tank according to the pressure change in the pressure regulating tank, thereby absorbing the pressure fluctuation in the water inlet pipe and the water return pipe, and keeping the pressure in the water inlet pipe and the water return pipe constant, so that the water hammer phenomenon of the condensed water is avoided, and the service life of the pipeline is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, the drawings in the following description only represent some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0016] Figure 1 A structure schematic view of a water hammer elimination system of a drying machine provided by the first embodiment of the present application is shown in the figure.

[0017] Figure 2 A partial sectional view of the pressure regulating tank and the water return pipe provided by the first embodiment of the present application is shown in the figure.

[0018] Figure 3 A front view of the support seat provided by the first embodiment of the present application is shown in the figure.

[0019] Figure 4 A sectional view of the buffer disc provided by the first embodiment of the present application is shown in the figure.

[0020] Figure 5 A front view of the buffer disc provided by the first embodiment of the present application is shown in the figure.

[0021] Figure 6 A partial enlarged view of the water return pipe provided by the second embodiment of the present application is shown in the figure.

[0022] Figure 7 A partial sectional view of the water return pipe provided by the second embodiment of the present application is shown in the figure.

[0023] In the figure: 1, heat exchanger; 2, drain trap; 3, pressure regulating tank; 301, support seat; 302, guide rod; 303, buffer disc; 304, water passage hole; 305, elastic member; 306, limiting member; 307, support ring; 308, support rod; 309, connecting rod; 310, sleeve; 311, annular groove; 312, brush; 4, air pump; 5, water pump; 501, slow closing check valve; 6, steam pipeline; 7, water inlet pipe; 701, pressure reducing valve; 8, water return pipe. DETAILED DESCRIPTION

[0024] In order to make the technical problems, technical schemes and beneficial effects of the present application more clearly understood, the present application will be further described in detail in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0025] Please refer to Figure 1The utility model provides a kind of drying machine backwater water hammer elimination system, and the utility model provides a kind of drying machine backwater water hammer elimination system, including: heat exchanger 1, drain trap 2, pressure tank 3, air pump 4 and water pump 5;Heat exchanger 1 and drain trap 2 are sequentially installed on steam pipeline 6, drain trap 2 and pressure tank 3 are connected by water inlet pipe 7, air pump 4 is fixedly installed at the top of pressure tank 3, the water outlet end of pressure tank 3 is installed with backwater pipe 8, and water pump 5 is installed on water inlet pipe 7;Air pump 4 injects or releases gas into pressure tank 3, to adjust the air pressure in pressure tank 3, to absorb the pressure fluctuation in water inlet pipe 7 and backwater pipe 8.

[0026] The utility model provides a kind of drying machine backwater water hammer elimination system, compared with prior art, the condensate water formed after high-temperature steam passes through drain trap 2 is under the action of water pump 5, enters into pressure tank 3 in water inlet pipe 7, then is discharged into backwater pipe 8.When water pump 5 starts or closes, the pressure in water inlet pipe 7 and backwater pipe 8 will change, at this time, air pump 4 injects or releases gas into pressure tank 3 according to the pressure change in pressure tank 3, to absorb the pressure fluctuation in water inlet pipe 7 and backwater pipe 8, so that the pressure in water inlet pipe 7 and backwater pipe 8 remains constant, thereby avoiding the water hammer phenomenon of condensate water, prolonging the service life of pipeline.

[0027] In some embodiments, referring to Figure 1 Water pump 5 is installed with slow-closing check valve 501.In this embodiment, slow-closing check valve 501 is a key valve device that reduces water hammer effect by controlling the closing speed of valve disc.When water flow stops suddenly or water pump 5 stops, valve disc starts to close under the action of self-weight and backflow of water flow.At this time, valve keeps valve disc at about 20% opening degree by piston or damping device, allows part of water flow to pass, realizes two-stage action of fast closing and slow closing.

[0028] In some embodiments, referring to Figure 1 Pressure reducing valve 701 is installed on water inlet pipe 7, and pressure reducing valve 701 is located at one end of water inlet pipe 7 close to drain trap 2.In this embodiment, pressure reducing valve 701 realizes pressure stabilization by reducing pipeline fluid pressure, and its internal water-hammer-proof design can quickly close valve when water flow reverses, prevents backflow to form pressure shock wave, and reduces the risk of water hammer.Because pressure reducing valve 701 is close to drain trap 2, condensate water in water inlet pipe 7 cannot reverse into drain trap 2, thereby protecting drain trap 2.

[0029] In addition, a flow monitor is arranged on the water inlet pipe 7, and the flow monitor is located on the side of the pressure reducing valve 701 away from the trap 2. The flow monitor can monitor the water flow in the water inlet pipe 7 in real time. When the flow abnormally fluctuates, such as suddenly increases or decreases, the system can timely send an alarm signal. In this way, the operator can quickly check the relevant equipment according to the alarm information to determine whether the water inlet pipe 7 itself is blocked or damaged, or whether other components such as the pressure reducing valve 701 or the trap 2 are malfunctioning. In this way, the problem can be handled at an early stage to avoid more serious equipment damage or system failure due to the failure to timely solve the small problem, thereby effectively improving the operation stability and safety of the entire system.

[0030] In some embodiments, referring to Figure 1 and Figure 2 , a support seat 301 is fixedly installed on the inner side wall of the pressure regulating tank 3, a guide rod 302 is fixedly installed on the support seat 301, the guide rod 302 extends into the water return pipe 8 and is parallel to the length direction of the water return pipe 8, two buffer discs 303 are slidingly installed on the guide rod 302, a water passage hole 304 for water flow is formed in each buffer disc 303, the two buffer discs 303 are connected by an elastic member 305, the elastic member 305 applies a reverse force to the two buffer discs 303, and a limiting member 306 is fixedly installed on the guide rod 302 and located on the side away from each buffer disc 303. In this embodiment, the support seat 301 is fixedly installed on the inner side wall of the pressure regulating tank 3, and the guide rod 302 is parallel to the length direction of the water return pipe 8. One end of the guide rod 302 is fixedly connected to the support seat 301, and the other end extends into the water return pipe 8. When the pressure in the water return pipe 8 remains stable, the two buffer discs 303 abut against the limiting members 306 under the action of the elastic member 305. When the pressure in the water return pipe 8 changes, the condensed water will flow accordingly, and the buffer discs 303 move along the guide rod 302 under the action of the water flow. Part of the water flow will continue to flow through the water passage hole 304 on the buffer disc 303. During the movement of the buffer disc 303, the elastic member 305 applies a reverse force to the buffer disc 303, thereby slowing down the water flow and eliminating the water hammer phenomenon. Regardless of the direction of the water flow, when the pressure in the water return pipe 8 suddenly increases, one of the buffer discs 303 will flow in the direction of the water flow, thereby eliminating the water hammer phenomenon.

[0031] In some embodiments, referring to Figure 2 and Figure 3The support seat 301 comprises a support ring 307 and a support rod 308. The support ring 307 is fixedly installed on the inner side wall of the pressure regulating tank 3 by fasteners. The inner diameter of the support ring 307 is greater than the diameter of the water outlet of the pressure regulating tank 3. The support rod 308 is fixedly installed on the inner side of the support ring 307. One end of the guide rod 302 is fixedly connected with the support rod 308. In this embodiment, the support ring 307 is coaxially arranged with the water outlet of the pressure regulating tank 3. Since the inner diameter of the support ring 307 is greater than the diameter of the water outlet of the pressure regulating tank 3, the support ring 307 will not block the water outlet. The support ring 307 is fixed on the inner side wall of the pressure regulating tank 3 by screws. The support rod 308 is a cylindrical rod. The support rod 308 is arranged along the radial direction of the support ring 307. Both ends of the support rod 308 in the length direction are fixedly connected with the support ring 307. One end of the guide rod 302 is located at the center of the support rod 308 and is insertedly connected with the support rod 308. The guide rod 302 and the support rod 308 are fixedly connected by circumferential welding.

[0032] In some embodiments, referring to Figure 6 and Figure 7 The guide rod 302 is sequentially connected by a plurality of connecting rods 309. Adjacent two connecting rods 309 are connected by a sleeve 310. The connecting rod 309 and the sleeve 310 are connected by threads. In this embodiment, the guide rod 302 adopts a split structure. The buffer disc 303 is installed on the connecting rod 309 farthest from the support rod 308. The length of the guide rod 302 can be adjusted by increasing or decreasing the number of the connecting rods 309, so as to change the position of the buffer disc 303 in the backwater pipe 8.

[0033] In some embodiments, referring to Figure 2 The elastic member 305 is a compression spring. The compression spring is sleeved on the guide rod 302. In this embodiment, the compression spring is a standard part. The appropriate specification of the compression spring can be selected according to the actual needs. Since the compression spring is sleeved on the guide rod 302, the compression spring can avoid large degree of bending deformation.

[0034] This not only helps to prolong the service life of the compression spring, but also can ensure that it always maintains stable elastic performance during work. When the device is running, the guide rod 302 provides a precise guide for the compression spring, so that the compression spring can only perform telescopic movement along the axial direction of the guide rod 302. Such telescopic movement enables the related components connected with the elastic member 305 to move along the predetermined track, thereby ensuring the normal operation of the entire device. For example, when the device is subjected to external pressure, the compression spring is compressed along the guide rod 302 to absorb and store energy. When the external pressure disappears, the compression spring rapidly returns to its original state along the guide rod 302 under the action of its own elastic force, releases the stored energy, and pushes the related components back to the initial position or continues the next action cycle.

[0035] In some embodiments, referring to Figure 2 , Figure 4 and Figure 5 , the two opposite side walls of the buffer disc 303 are provided with annular grooves 311 for positioning the compression spring. In this embodiment, the two ends of the compression spring are respectively abutted against the side walls of the two buffer discs 303. The annular grooves 311 are coaxially arranged with the buffer disc 303. The annular grooves 311 are matched with the inner and outer contours of the compression spring, so that the compression spring is coaxial with the buffer disc 303, and the force balance of the buffer disc 303 is ensured.

[0036] In some embodiments, referring to Figure 2 , the limiting member 306 is a check ring. In this embodiment, the check ring adopted by the limiting member 306 is a shaft check ring, and the guide rod 302 is provided with a groove for mounting the check ring. The check ring is an open check ring, and the opening shape of the check ring is E-shaped.

[0037] In some embodiments, referring to Figure 2 and Figure 4 , the outer periphery of the buffer disc 303 is provided with a brush 312, and the brush 312 is in contact with the inner wall of the water return pipe 8. In this embodiment, the brush 312 is arranged on the outer periphery of the buffer disc 303. Since the brush 312 is in contact with the inner wall of the water return pipe 8, the brush 312 plays a certain supporting role on the buffer disc 303, so as to avoid the bending deformation of the end of the guide rod 302 away from the support rod 308 under the action of the buffer disc 303. When the buffer disc 303 slides on the guide rod 302 due to the change of the pressure in the water return pipe 8, the brush 312 can clean the inner wall of the water return pipe 8, so as to avoid the accumulation of foreign matters on the inner wall of the water return pipe 8.

[0038] The above only describes the preferred embodiments of the utility model, and does not limit the utility model. Any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A dryer backwater water hammer elimination system characterized by, It includes: Heat exchanger, trap, pressure tank, air pump and water pump; the heat exchanger and the trap are installed in sequence on the steam pipeline, the trap and the pressure tank are connected through the water inlet pipe, the air pump is fixedly installed on the top of the pressure tank, the water outlet end of the pressure tank is provided with a backwater pipe, and the water pump is installed on the water inlet pipe; the air pump injects or releases gas into the pressure tank, thereby adjusting the air pressure in the pressure tank, thereby absorbing the pressure fluctuation in the water inlet pipe and the backwater pipe.

2. A dryer backwater water hammer elimination system as defined in claim 1, wherein, The water pump is provided with a slow closing check valve.

3. A dryer backwater water hammer elimination system as defined in claim 1, wherein, A pressure reducing valve is installed on the water inlet pipe, and the pressure reducing valve is located at one end of the water inlet pipe close to the trap.

4. A dryer backwater water hammer elimination system as defined in claim 1, wherein, A support seat is fixedly installed on the inner side wall of the pressure tank, a guide rod is fixedly installed on the support seat, the guide rod extends into the backwater pipe and is parallel to the length direction of the backwater pipe, two buffer discs are slidably installed on the guide rod, water holes are formed in the buffer discs for water flow, the two buffer discs are connected by elastic members, the elastic members apply opposite forces to the two buffer discs, and limit members are fixedly installed on the guide rod and located on the sides away from each other of the two buffer discs.

5. A dryer backwater water hammer elimination system as defined in claim 4, wherein, The support seat includes a support ring and a support rod, the support ring is fixedly installed on the inner side wall of the pressure tank by fasteners, the inner diameter of the support ring is greater than the diameter of the water outlet of the pressure tank, and the support rod is fixedly installed on the inner side of the support ring, one end of the guide rod is fixedly connected with the support rod.

6. A dryer backwater water hammer elimination system as defined in claim 4, wherein, The guide rod is composed of a plurality of connecting rods connected in sequence, adjacent two connecting rods are connected by a sleeve, and the connecting rod and the sleeve are connected by threads.

7. A dryer backwater water hammer elimination system as defined in claim 4 wherein, The elastic member is a compression spring, and the compression spring is sleeved on the guide rod.

8. A dryer backwater water hammer elimination system as defined in claim 7, wherein, The opposite side walls of the two buffer discs are provided with annular grooves for positioning the compression spring.

9. A dryer backwater water hammer elimination system as defined in claim 4 wherein, The limit member is a check ring.

10. A dryer backwater water hammer elimination system as defined in claim 4, wherein, The outer circumference of the buffer disc is provided with a brush, and the brush is in contact with the inner wall of the backwater pipe. The limit member is a check ring.

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