Pressure relief device for water injection pipe of watering cart

Abstract

The pressure relief device comprises a mounting hole formed in the top of a water tank of the watering cart, a mounting cylinder is arranged at the position, corresponding to the mounting hole, of the top of the water tank, the inner diameter of the mounting cylinder is larger than the diameter of the mounting hole, a circular ring is horizontally and fixedly connected into the mounting cylinder, and a plurality of exhaust holes are formed in the circular ring. An I-shaped sealing block used for sealing the mounting cylinder is slidably arranged in an inner hole of the circular ring, a compression spring is arranged between the sealing block and the lower end face of the circular ring, and the end, located outside the water tank, of the watering cart water injection pipe is connected with an auxiliary pressure relief mechanism used for relieving pressure in the water injection pipe when the pressure in the water tank exceeds a set value. The pressure in the water tank rises during water injection, the sealing block is pushed to move to gradually open the mounting cylinder, air in the water tank is discharged through the exhaust hole, and the auxiliary pressure relief mechanism can be started to relieve pressure when the pressure in the water tank exceeds a set value. And the problem that the pressure in the water tank is accumulated when water is injected into the water tank of the watering cart adopting a totally-closed structure is effectively avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water spraying vehicles, in particular to a water spraying vehicle water filling pipe pressure relief device. BACKGROUND

[0002] The water spraying vehicle is also called a spraying vehicle, a multifunctional water spraying vehicle, a garden greening water spraying vehicle, a water tank vehicle, and a water transport vehicle. The water spraying vehicle is suitable for washing various roads, trees, green belts, lawns, road construction, mine enterprise construction, high-altitude building washing, and has the functions of water spraying, dust suppression, high and low position spraying, pesticide spraying, guardrail washing, water transportation, drainage, emergency fire fighting, and the like.

[0003] The water tank of the water spraying vehicle is usually in a fully enclosed structure to maintain sealing during transportation. However, when filling water, the design causes the air in the water tank to be compressed when water is injected into the water tank, and the internal air pressure increases exponentially as the water level rises. When the tank internal pressure is equal to the external water pressure, the water filling is forced to stop, resulting in the water tank being unable to be completely filled. Moreover, due to the ineffective discharge of the air in the water tank, air resistance is formed, resulting in a decrease in the water filling speed.

[0004] Therefore, how to ensure that the internal pressure of the water tank is not accumulated when filling water in the water tank of the water spraying vehicle with a fully enclosed structure is a problem to be solved by those skilled in the art. CONTENT OF THE INVENTION

[0005] In view of the problems in the prior art, the present application provides a water spraying vehicle water filling pipe pressure relief device.

[0006] The water spraying vehicle water filling pipe pressure relief device provided by the present application adopts the following technical scheme:

[0007] A water spraying vehicle water filling pipe pressure relief device includes a mounting hole formed at the top of a water tank of a water spraying vehicle away from one end of a water filling pipe of the water spraying vehicle, a mounting cylinder is arranged at the top of the water tank corresponding to the mounting hole, the inner diameter of the mounting cylinder is greater than the diameter of the mounting hole, a circular ring is horizontally fixed in the mounting cylinder, a plurality of exhaust holes are formed in the circular ring, a I-shaped sealing block for closing the mounting cylinder is slidably arranged in the circular ring, a compression spring is arranged between the sealing block and the lower end surface of the circular ring, and one end of the water filling pipe outside the water tank is connected with an auxiliary pressure relief mechanism for relieving the pressure in the water filling pipe when the pressure in the water tank exceeds a set value.

[0008] Further, the auxiliary pressure relief mechanism comprises a pipe body, one end of the pipe body is connected with the water injection pipe of the water sprinkling vehicle, the other end is used for connecting an external water injection device, a pressure relief hole is formed in the pipe body, a pressure relief cylinder is arranged at the position corresponding to the pressure relief hole, the inner diameter of the pressure relief cylinder is larger than the diameter of the pressure relief hole, a sealing assembly for closing the pressure relief hole is arranged in the pressure relief cylinder, a cap is detachably installed at the end of the pressure relief cylinder far from the pressure relief hole, and a return spring for driving the sealing assembly to close the pressure relief hole is arranged between the sealing assembly and the cap.

[0009] Further, the sealing assembly comprises a valve flap, a connecting block and a valve seat, the valve flap is fitted with the pressure relief hole, the connecting block is fixed at the end of the valve flap close to the pressure relief cylinder, and the valve seat is arranged at the position corresponding to the connecting block in the pipe body; when the valve flap closes the pressure relief hole, the connecting block is attached to the valve seat.

[0010] Further, the end of the connecting block away from the valve flap is fixed with a connecting rod penetrating through the cap, and the compression spring is sleeved on the connecting rod.

[0011] Further, two clamping blocks are arranged in parallel on one side of the upper end surface of the cap, a handle is hingedly arranged between the two clamping blocks, and the middle part of the handle is hingedly connected with the connecting rod; when the handle is pulled upward, the valve flap is away from the pressure relief hole.

[0012] Further, the end of the handle towards the cap is provided with a rubber strip.

[0013] Further, the end of the pressure relief cylinder close to the cap is provided with a pressure relief port.

[0014] In summary, the beneficial technical effects of the present application are:

[0015] In the initial state, the upper end of the sealing block closes the upper end of the mounting cylinder to prevent the liquid in the water tank from leaking from the mounting hole. The pressure in the water tank is in the normal range, and the auxiliary pressure relief mechanism is in the closed state. As the water injection continues, the pressure in the water tank continues to rise, and when the pressure in the water tank rises and reaches a set value, under the action of the pressure in the water tank, the sealing block compresses the compression spring and moves towards the mounting cylinder, gradually opening the mounting cylinder as the sealing block moves, and the air in the water tank is discharged through the exhaust hole to balance the pressure and avoid affecting the water injection. When the pressure in the water tank exceeds the set value, the auxiliary pressure relief mechanism senses the pressure change and starts to release the pressure in the water injection pipe. When the water injection is completed, the auxiliary pressure relief mechanism stops working, and the sealing block is closed again under the action of the compression spring. The pressure in the water tank is effectively balanced during the water injection process, avoiding the influence of high pressure on the water injection; and when the exhaust hole is accidentally blocked, the auxiliary pressure relief mechanism can be started to release the pressure, further improving the reliability of the pressure relief device and reducing the risk of accidents caused by component failure. The problem of pressure accumulation in the water tank when injecting water into the water tank of a fully enclosed sprinkler vehicle is effectively avoided. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a partial top view of the water tank and the mounting cylinder of the embodiment of the present application;

[0017] Figure 2 is a partial cross-sectional view along line A-A in Figure 1

[0018] Figure 3 is a top view of the auxiliary pressure relief mechanism of the embodiment of the present application;

[0019] Figure 4 is a cross-sectional view along line B-B in Figure 3

[0020] BRIEF DESCRIPTION OF DRAWINGS1, water tank; 11, mounting hole; 2, mounting cylinder; 21, circular ring; 211, exhaust hole; 22, sealing block; 23, compression spring; 3, pipe body; 31, pressure relief hole; 311, valve; 312, valve seat; 313, connecting block; 32, pressure relief cylinder; 321, return spring; 322, connecting rod; 323, cap; 324, pressure relief port; 4, clamping block; 41, handle; 411, rubber strip. DETAILED DESCRIPTION

[0021] The technical solutions of the present application will be described in detail below with reference to the drawings. Obviously, the described embodiments are part of the embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application. ​

[0022] The embodiment of the application discloses a water tank filling pipe pressure relief device of a water spraying vehicle. Figure 1 and Figure 2 The water tank filling pipe pressure relief device of the water spraying vehicle comprises a mounting hole 11 formed at the top of a water tank 1 of the water spraying vehicle and away from one end of a water filling pipe of the water tank 1, a mounting cylinder 2 arranged at the top of the water tank 1 and corresponding to the mounting hole 11, wherein the inner diameter of the mounting cylinder 2 is greater than the diameter of the mounting hole 11, and the mounting cylinder 2 and the water tank 1 can be fixed by welding, bolt connection or the like. A circular ring 21 is horizontally fixed in the mounting cylinder 2 and can be connected with the inner wall of the mounting cylinder 2 by welding, clamping or the like. A plurality of exhaust holes 211 are formed in the circular ring 21, and a I-shaped sealing block 22 for sealing the mounting cylinder 2 is slidably arranged in the circular ring 21. A compression spring 23 is arranged between the sealing block 22 and the lower end surface of the circular ring 21. When the sealing block 22 moves to a set position, air in the water tank 1 of the water spraying vehicle can be discharged from the mounting cylinder 2 through the exhaust holes 211, so that the pressure balance is achieved. One end of the water filling pipe located outside the water tank 1 is connected with an auxiliary pressure relief mechanism for unloading the pressure in the water filling pipe when the pressure in the water tank 1 exceeds a set value.

[0023] In this way, in the initial state, the upper end of the sealing block 22 seals the upper end of the mounting cylinder 2, so that the liquid in the water tank 1 is prevented from leaking from the mounting hole 11. The pressure in the water tank 1 is in a normal range, and the auxiliary pressure relief mechanism is in a closed state. With the continuous water filling, the pressure in the water tank 1 continuously rises, and when the pressure in the water tank 1 rises to a set value, under the action of the pressure in the water tank 1, the sealing block 22 compresses the compression spring 23 and moves towards the mounting cylinder 2. With the movement of the sealing block 22, the mounting cylinder 2 is gradually opened, air in the water tank 1 is discharged through the exhaust holes 211, so that the pressure balance is achieved, and the influence of water filling on the water tank 1 is avoided. When the pressure in the water tank 1 exceeds the set value, the auxiliary pressure relief mechanism senses the pressure change and starts to unload the pressure in the water filling pipe. When the water filling is completed, the auxiliary pressure relief mechanism stops working, and the sealing block 22 seals the mounting cylinder 2 again under the action of the compression spring 23. The pressure in the water tank 1 is effectively balanced during the water filling process, and the influence of high pressure on the water filling is avoided. When the exhaust holes 211 are accidentally blocked, the auxiliary pressure relief mechanism can be started to relieve the pressure, so that the reliability of the pressure relief device is further improved, and the risk of accidents caused by component failure is reduced. The problem of pressure accumulation in the water tank 1 of the water spraying vehicle with a fully closed structure during water filling is effectively avoided.

[0024] Specifically, referring to Figure 3 and Figure 4The auxiliary pressure relief mechanism comprises a pipe body 3 having two interfaces. One interface of the pipe body 3 is connected with the water injection pipe of the water truck, and the other interface is used for connecting an external water injection device. The pipe body 3 is provided with a pressure relief hole 31, and a pressure relief cylinder 32 is arranged at the position corresponding to the pressure relief hole 31 on the pipe body 3. The inner diameter of the pressure relief cylinder 32 is greater than the diameter of the pressure relief hole 31. A sealing assembly for sealing the pressure relief hole 31 is arranged in the pressure relief cylinder 32. A cap 323 is detachably installed at the end of the pressure relief cylinder 32 away from the pressure relief hole 31, and the cap 323 is threadedly connected to the pressure relief cylinder 32. A return spring 321 for driving the sealing assembly to seal the pressure relief hole 31 is arranged between the sealing assembly and the cap 323.

[0025] Further, with reference to Figure 3 and Figure 4 , the sealing assembly comprises a valve disc 311, a connecting block 313 and a valve seat 312. The valve disc 311 is fitted with the pressure relief hole 31, and the connecting block 313 is fixedly connected to the end of the valve disc 311 close to the pressure relief cylinder 32. The pipe body 3 is provided with the valve seat 312 at the position corresponding to the connecting block 313. When the valve disc 311 seals the pressure relief hole 31, the connecting block 313 is in close contact with the valve seat 312.

[0026] Under normal circumstances, the return spring 321 drives the valve disc 311 to tightly contact the pressure relief hole 31, and the connecting block 313 tightly contacts the valve seat 312 to form a seal. At this time, the connection between the water injection pipe of the water truck and the external water injection device is sealed, and liquid or gas cannot leak through the pressure relief hole 31. When the pressure in the water tank 1 rises to a set value and the main pressure relief path cannot meet the pressure relief demand, the pressure will be transmitted to the pressure relief hole 31 through the pipe body 3. Under sufficient pressure, the valve disc 311 will overcome the elastic force of the return spring 321 and move into the pressure relief cylinder 32. With the movement of the valve disc 311, the seal between the connecting block 313 and the valve seat 312 is broken, the pressure relief hole 31 is opened, and the pressure is released. When the pressure decreases to a safe range, the return spring 321 will drive the sealing assembly to reseal the pressure relief hole 31, restoring the sealed state of the system. A safe, reliable and easy-to-maintain pressure relief solution is provided for the water injection pipe of the water truck.

[0027] Further, with reference to Figure 3 and Figure 4 , the end of the connecting block 313 away from the valve disc 311 is fixedly connected with a connecting rod 322 penetrating through the cap 323, and a compression spring 23 is sleeved on the connecting rod 322. The cooperation of the connecting rod 322 and the compression spring 23 improves the stability of the valve disc 311 during movement, preventing the valve disc 311 from being deflected or stuck.

[0028] Further, with reference to Figure 3 and Figure 4Two clamping blocks 4 are arranged in parallel on one side of the upper end surface of the cap 323, and a handle 41 is hingedly arranged between the two clamping blocks 4, and the middle part of the handle 41 is hingedly connected with the connecting rod 322; when the handle 41 is pulled upward, the valve disc 311 is away from the pressure relief hole 31.

[0029] In this way, under normal circumstances, the handle 41 is in a natural state of drooping, and the valve disc 311 is tightly attached to the pressure relief hole 31 under the action of the compression spring 23. When manual pressure relief is needed, the operator can pull the handle 41 upward, and the handle 41 drives the connecting rod 322 to move upward through the hinged relationship, and in turn drives the valve disc 311 to move away from the pressure relief hole 31, thereby opening the pressure relief passage. After the operation is completed, the operator releases the handle 41, and the elastic force of the compression spring 23 will drive the connecting rod 322 and the valve disc 311 to return to the original position and reattach to the pressure relief hole 31, thereby forming a seal. The pressure relief device can be conveniently manually relieved when needed, thereby further improving the adaptability and safety of the device.

[0030] Meanwhile, referring to Figure 3 and Figure 4 , the end of the handle 41 towards the cap 323 is provided with a rubber strip 411, which has good elasticity and friction, and can increase the stability and comfort of the operator holding the handle 41, thereby preventing the operator from slipping and causing operation errors.

[0031] In addition, referring to Figure 3 , the pressure relief cylinder 32 is provided with a pressure relief port 324 at one end close to the cap 323, so as to facilitate the operator to observe and confirm the pressure relief state, and also facilitate the connection of the pressure relief port 324 with the external drain pipe.

[0032] The implementation principle of the water cart water filling pipe pressure relief device according to the embodiment of the present application is as follows:

[0033] In the initial state, the upper end of the sealing block 22 seals the upper end of the mounting cylinder 2, preventing the liquid in the water tank 1 from leaking from the mounting hole 11. The pressure in the water tank 1 is in the normal range, and the auxiliary pressure relief mechanism is in the closed state. As the water injection continues, the pressure in the water tank 1 continues to rise, and when the pressure in the water tank 1 rises to a set value, under the action of the pressure in the water tank 1, the sealing block 22 compresses the compression spring 23 and moves towards the mounting cylinder 2, gradually opening the mounting cylinder 2 as the sealing block 22 moves, and the air in the water tank 1 is discharged through the exhaust hole 211 to balance the pressure and avoid affecting the water injection of the water tank 1. When the pressure in the water tank 1 exceeds the set value, the auxiliary pressure relief mechanism senses the pressure change and starts to release the pressure in the water injection pipe. When the water injection is completed, the auxiliary pressure relief mechanism stops working, and the sealing block 22 is again closed to the mounting cylinder 2 under the action of the compression spring 23. This effectively balances the pressure in the water tank 1 during water injection, avoiding the impact of high pressure on water injection; and when the exhaust hole 211 is accidentally blocked, the auxiliary pressure relief mechanism can be started to relieve pressure, further improving the reliability of the pressure relief device and reducing the risk of accidents caused by component failure. The problem of pressure accumulation in the water tank of the water truck with a fully enclosed structure during water injection is effectively avoided.

[0034] Unless otherwise defined, technical terms or scientific terms used in the present application shall be understood as having the usual meaning understood by a person skilled in the art to which the present application belongs. The "first", "second", "third" and similar words used in the specification and claims of the present application do not represent any order, quantity or importance, but are used to distinguish different components. "One" or "a" and similar words do not represent a quantity limitation, but represent the existence of at least one. "Include" or "contain" and similar words mean that the elements or objects appearing before "include" or "contain" cover the elements or objects listed after "include" or "contain" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are used to represent relative positional relationships, and when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0035] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape, principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A pressure relief device for the water injection pipe of a sprinkler truck, characterized in that, The mounting hole (11) is arranged on the top of the water tank (1) away from the water filling pipe, and the mounting cylinder (2) is arranged on the top of the water tank (1) corresponding to the mounting hole (11), the inner diameter of the mounting cylinder (2) is larger than the diameter of the mounting hole (11), the circular ring (21) is horizontally fixedly connected in the mounting cylinder (2), a plurality of exhaust holes (211) are arranged on the circular ring (21), the I-shaped sealing block (22) is arranged in the circular ring (21) and is used for closing the mounting cylinder (2), the compression spring (23) is arranged between the sealing block (22) and the lower end surface of the circular ring (21), and the auxiliary pressure relief mechanism is connected to the water filling pipe of the watering cart.

2. The pressure relief device for a water tender fill pipe according to claim 1, wherein, The auxiliary pressure relief mechanism comprises a pipe body (3), one interface of the pipe body (3) is connected with the water filling pipe of the watering cart, the other interface is used for connecting external water filling equipment, the pressure relief hole (31) is arranged on the pipe body (3), the pressure relief cylinder (32) is arranged on the pipe body (3) corresponding to the pressure relief hole (31), the inner diameter of the pressure relief cylinder (32) is larger than the diameter of the pressure relief hole (31), the sealing assembly is arranged in the pressure relief cylinder (32) and is used for closing the pressure relief hole (31), the cap (323) is detachably arranged at the end of the pressure relief cylinder (32) away from the pressure relief hole (31), and the reset spring (321) is arranged between the sealing assembly and the cap (323) and is used for driving the sealing assembly to close the pressure relief hole (31).

3. A pressure relief device for a water tender fill pipe according to claim 2, wherein, The sealing assembly comprises the valve clack (311), the connecting block (313) and the valve seat (312), the valve clack (311) is embeddedly matched with the pressure relief hole (31), the connecting block (313) is fixedly connected to the end of the valve clack (311) close to the pressure relief cylinder (32), and the valve seat (312) is arranged on the pipe body (3) corresponding to the connecting block (313); when the valve clack (311) closes the pressure relief hole (31), the connecting block (313) is attached to the valve seat (312).

4. The pressure relief device for a water tender fill pipe according to claim 3, wherein, The connecting rod (322) penetrating through the cap (323) is fixedly connected to the end of the connecting block (313) away from the valve clack (311), and the compression spring (23) is sleeved on the connecting rod (322).

5. A pressure relief device for a water tender fill pipe according to claim 4, wherein, Two clamping blocks (4) are arranged in parallel on one side of the upper end surface of the cap (323), the handle (41) is hingedly arranged between the two clamping blocks (4), and the middle part of the handle (41) is hingedly connected with the connecting rod (322); when the handle (41) is pulled upward, the valve clack (311) is away from the pressure relief hole (31).

6. A pressure relief device for a water tender fill pipe according to claim 5, wherein, The rubber strip (411) is arranged on the end of the handle (41) facing the cap (323).

7. The pressure relief device for a water tender fill pipe of claim 2, wherein, The pressure relief port (324) is arranged on the end of the pressure relief cylinder (32) close to the cap (323).

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