Water supply selectable water inlet valve structure and fire fighting truck thereof

Abstract

The utility model discloses a water supply selectable water inlet valve structure and a fire fighting truck thereof, and belongs to the technical field of fire fighting equipment. Comprising a valve body, and a group of valve body water inlet connectors and a valve body water outlet connector are formed in the side portion of the valve body. The valve cover is hermetically fixed with the upper opening of the valve body; the valve mechanism is arranged in the valve body cavity, the bottom of the valve mechanism is pivotally supported on the bottom wall of the valve body cavity, the middle part is matched with one side, facing the valve body cavity, of the valve body water inlet interface, and the top is matched with the valve cover; the valve position pivoting switching mechanism is matched with the top of the valve mechanism and is characterized in that the group of valve body water inlet interfaces comprises a water tank left connecting pipe interface formed on the left side of the valve body, a water tank right connecting pipe interface formed on the right side of the valve body, an external environment water source hose left connecting port formed at the left end of the front side of the valve body and an external environment water source hose right connecting port formed at the right end of the front side of the valve body; the valve body water outlet connector is formed in the middle of the rear side of the valve body. The system has the advantages that water in the water tank and external environment such as pond and lake water are shared, and water in the water tank is saved; and the requirement for sufficient water supply on a fire-extinguishing site is met.

Description

Technical Field

[0001] The utility model belongs to the technical field of fire fighting equipment, and particularly relates to an inlet valve structure with selectable water supply and a fire truck equipped with the same. Background Art

[0002] As is known to all, in the process of a fire truck going out for fire fighting and disaster relief, the forms of obtaining fire fighting water are mainly but not limited to the following: water carried by the water storage tank (commonly called "water tank" hereinafter) of the fire truck, water supply fire trucks that travel with or alternately supply water to the fire scene with the main battle fire truck, water drawn from the fire hydrant at the fire scene, and water from nearby rivers and ponds as the water source (commonly called "external environment water source" in the industry, hereinafter the same). Still as is known in the industry, due to the limitation of the structure of the inlet valve (also called "water supply valve"), usually only one of the above-mentioned water sources can be selected, and it cannot meet the requirement of randomly switching to multiple water sources as needed. For example, taking the form of setting a switch valve or a three-way valve on the pipeline as an example, although it can meet the requirement of switching water use between the water storage tank and the water intake of the water hose, this water intake method belongs to single-connected water intake, and the water supply of single-connected water intake is often limited, that is, it cannot meet the requirement of large-scale water supply. A typical example is that for a relatively small and less severe fire, only using the fire extinguishing water in the water storage tank carried by the fire truck may be more than enough to extinguish the fire, or in a place with fire fighting facilities, only relying on the water supply of the fire hydrant can extinguish the fire. However, in some cases, due to the fierce fire and large scope, not only many fire trucks need to cooperate in fire fighting operations, but also the problem of water supply is confusing. Considering the actual fire fighting water requirements expected by the fire department, for the same fire truck, if it can not only select the water carried by the vehicle, but also use the water introduced from the river pond by the water hose, and can also use the water of the above two (including the water of the river pond and the water storage tank of the fire truck or the fire hydrant and the water storage tank of the fire truck) to save the water in the water storage tank of the fire truck itself, then it should be quite ideal. However, in terms of the current structure of the inlet valve of the fire truck, it still cannot meet the above-mentioned perfect requirements. Summary of the Utility Model

[0003] The task of the utility model is to provide an inlet valve structure with selectable water supply that can help to ensure the sufficient water supply requirement at the fire scene by targeting the type of fire fighting water according to the severity and scope of the fire.

[0004] Another task of the utility model is to provide a fire truck equipped with the above-mentioned inlet valve structure to meet the requirement of selecting water supply as needed.

[0005] The task of the present utility model is completed as follows. A water inlet valve structure with selectable water supply includes a valve body. A group of valve body water inlet interfaces communicating with the valve body cavity are formed on the side of the valve body, and a valve body water outlet interface. The valve body water outlet interface is connected to the water inlet interface of the water pump of the water pump in the use state; a valve cover, which is hermetically fixed to the upper open position of the valve body; a valve mechanism, which is arranged in the valve body cavity, and the bottom of the valve mechanism is pivotally supported on the bottom wall of the valve body cavity of the valve body cavity. The middle part of the valve mechanism cooperates with the side of the valve body water inlet interface facing the valve body cavity, and the top of the valve mechanism is rotationally matched with the valve cover and extends above the valve cover; a valve position pivot switching mechanism, which cooperates with the top of the valve mechanism at a position corresponding to above the valve cover. It is characterized in that the group of valve body water inlet interfaces includes a water tank left connection pipe interface formed on the left side of the valve body, a water tank right connection pipe interface formed on the right side of the valve body, an external environment water source water belt left connection port formed at the left end of the front side of the valve body, and an external environment water source water belt right connection port formed at the right end of the front side of the valve body. The valve body water outlet interface is formed at the middle position of the rear side of the valve body.

[0006] In a specific embodiment of the present utility model, a valve cover sealing ring groove is formed on the upper surface facing upward and around the circumference of the upper open part of the valve body. A valve cover sealing ring is embedded in the valve cover sealing ring groove, and valve cover fixing screw holes are also spaced apart outside the valve cover sealing ring groove. Valve cover screw holes are formed on the valve cover at positions corresponding to the valve cover fixing screw holes. The valve seat is fixed to the upper open position of the valve body by screwing the valve cover screws into the valve cover fixing screw holes at positions corresponding to the valve cover screw holes, and the four peripheral edge parts on the side facing downward of the valve cover and the upper open part of the valve body are sealed by the valve cover sealing ring.

[0007] In another specific embodiment of the present utility model, a left valve cover shaft seat is formed at the centered position at the left end of the valve cover, and a right valve cover shaft seat is formed at the centered position at the right end of the valve cover; a left valve rotation support seat is formed within the valve body cavity of the valve body and at the intersection position of the water tank left connection pipe interface and the outer environment water source water belt left connection port facing the valve body cavity, and a right valve rotation support seat is formed at the intersection position of the water tank right connection pipe interface and the outer environment water source water belt right connection port facing the valve body cavity, and the left valve cover shaft seat and the left valve rotation support seat are on the same longitudinal axis, and the right valve cover shaft seat and the right valve rotation support seat are on the same longitudinal axis; the valve mechanism is rotationally matched with the left valve cover shaft seat and the left valve rotation support seat and is also rotationally matched with the right valve cover shaft seat and the right valve rotation support seat at the same time; the valve position pivot switching mechanism is matched with the top of the valve mechanism at the position above the left valve cover shaft seat and the right valve cover shaft seat.

[0008] In yet another specific embodiment of the present utility model, a water tank left connection pipe interface sealing ring is fixed by screws within the water tank left connection pipe interface, a water tank right connection pipe interface sealing ring is fixed by screws within the water tank right connection pipe interface, an outer environment water source water belt left connection port sealing ring is fixed by screws within the outer environment water source water belt left connection port, and an outer environment water source water belt right connection port sealing ring is fixed by screws within the outer environment water source water belt right connection port.

[0009] In yet another specific embodiment of the present utility model, the valve mechanism includes a left switching valve and a right switching valve. A left switching valve upper support shaft arm plate extends rightward from the top of the left switching valve. A left switching valve upper support shaft is fixed to the upward-facing side of the left switching valve upper support shaft arm plate. The lower end of the left switching valve upper support shaft is rotatably engaged with the left valve cover shaft seat, and the upper end of the left switching valve upper support shaft is configured as a square head of the left switching valve upper support shaft, and this square head of the left switching valve upper support shaft extends above the left valve cover shaft seat. A left switching valve lower support shaft arm plate extends rightward from the bottom of the left switching valve. A left switching valve lower support shaft is fixed to the downward-facing side of the left switching valve lower support shaft arm plate. The left switching valve lower support shaft is rotatably supported on the left valve rotation support seat. The left switching valve rotates clockwise or counterclockwise between the left connection pipe interface of the water tank and the left connection port of the external environment water source hose. And when it rotates to the extent of being in contact and cooperation with the left connection pipe interface of the water tank, it closes the left connection pipe interface of the water tank, and at the same time opens the left connection port of the external environment water source hose. And when the left switching valve rotates to the extent of being in contact and cooperation with the left connection port of the external environment water source hose, it closes the left connection port of the external environment water source hose, and at the same time opens the left connection pipe interface of the water tank. A right switching valve upper support shaft arm plate extends leftward from the top of the right switching valve. A right switching valve upper support shaft is fixed to the upward-facing side of the right switching valve upper support shaft arm plate. The lower end of the right switching valve upper support shaft is rotatably engaged with the right valve cover shaft seat, and the upper end of the right switching valve upper support shaft is configured as a square head of the right switching valve upper support shaft, and this square head of the right switching valve upper support shaft extends above the right valve cover shaft seat. A right switching valve lower support shaft arm plate extends leftward from the bottom of the right switching valve. A right switching valve lower support shaft is fixed to the downward-facing side of the right switching valve lower support shaft arm plate. The right switching valve lower support shaft is rotatably supported on the right valve rotation support seat. The valve position pivot switching mechanism cooperates with the square head of the left switching valve upper support shaft and the square head of the right switching valve upper support shaft at positions corresponding to above the left valve cover shaft seat and the right valve cover shaft seat. The right switching valve rotates clockwise or counterclockwise between the right connection pipe interface of the water tank and the right connection port of the external environment water source hose. And when it rotates to the extent of being in contact and cooperation with the right connection pipe interface of the water tank, it closes the right connection pipe interface of the water tank, and at the same time opens the right connection port of the external environment water source hose. And when the right switching valve rotates to the extent of being in contact and cooperation with the right connection port of the external environment water source hose, it closes the right connection port of the external environment water source hose, and at the same time opens the right connection pipe interface of the water tank. The mutually opposite sides of the left switching valve and the right switching valve are each configured as arc-shaped surfaces.

[0010] In still another specific embodiment of the present utility model, a valve cover left shaft seat hole for the rotational fit of the upper support shaft of the left switching valve is formed at the central position of the left shaft seat of the valve cover. A pair of upper support shaft seals of the left switching valve are embedded on the upper support shaft of the left switching valve, and this pair of upper support shaft seals of the left switching valve are in sealing fit with the hole wall of the valve cover left shaft seat hole; a valve cover right shaft seat hole for the rotational fit of the upper support shaft of the right switching valve is formed at the central position of the right shaft seat of the valve cover. A pair of upper support shaft seals of the right switching valve are embedded on the upper support shaft of the right switching valve, and this pair of upper support shaft seals of the right switching valve are in sealing fit with the hole wall of the valve cover right shaft seat hole.

[0011] In yet another specific embodiment of the present utility model, the valve position pivot switching mechanism includes a manual operation device for the upper support shaft of the left switching valve and a manual operation device for the upper support shaft of the right switching valve. The manual operation device for the upper support shaft of the left switching valve is in cooperation with the square head of the upper support shaft of the left switching valve at a position above the left shaft seat of the valve cover, and the manual operation device for the upper support shaft of the right switching valve is in cooperation with the square head of the upper support shaft of the right switching valve at a position above the right shaft seat of the valve cover.

[0012] In a further specific embodiment of the present utility model, a pair of left arc tooth plate fixing ears are formed on the outer wall of the left shaft seat of the valve cover, and this pair of left arc tooth plate fixing ears are spaced 180° from each other in the circumferential direction around the left shaft seat of the valve cover; the manual operation device for the upper support shaft of the left switching valve includes a left operation handle, a left operation sleeve, a left locking handle and a left arc tooth plate. The left arc tooth plate is fixed to the left shaft seat of the valve cover at a position corresponding to the left arc tooth plate fixing ears by a pair of left arc tooth plate fixing screws. A pair of left arc tooth plate stop feet are formed at the edge of the left arc tooth plate, and this pair of left arc tooth plate stop feet are spaced 180° from each other in the circumferential direction around the left arc tooth plate. A left arc tooth plate relief hole is formed on the left arc tooth plate and at a position corresponding to the left shaft seat hole of the valve seat. The square head of the upper support shaft of the left switching valve extends above the left arc tooth plate relief hole. The left operation sleeve is fixed to the lower side of the right end of the left operation handle and is in cooperation with the square head of the upper support shaft of the left switching valve. The left end of the left operation handle is configured as a manual operation gripping end. The left locking handle is located below the left operation handle. The right end of the left locking handle is hinged to the left operation handle by a left locking handle hinge pin. A left locking handle return spring is arranged in the middle. The lower end of the left locking handle return spring is supported on the left locking handle, and the upper end is supported on the lower side of the left operation handle. The left end of the left locking handle is configured as a free end; wherein, a left limiting flange that is in cooperation with or disengaged from the left arc tooth plate tooth groove on the left arc tooth plate is formed at the front side of the left locking handle and to the right of the left locking handle hinge pin.

[0013] In yet another specific embodiment of the present utility model, a pair of right arc tooth plate fixing ears are formed on the outer wall of the right shaft seat of the valve cover. The pair of right arc tooth plate fixing ears are spaced 180° from each other in the circumferential direction around the right shaft seat of the valve cover. The upper support shaft manual operation device of the right switching valve includes a right operation handle, a right operation sleeve, a right locking handle and a right arc tooth plate. The right arc tooth plate is fixed to the right shaft seat of the valve cover at a position corresponding to the right arc tooth plate fixing ears by a pair of right arc tooth plate fixing screws. A pair of right arc tooth plate retaining feet are formed at the edge of the right arc tooth plate. The pair of right arc tooth plate retaining feet are spaced 180° from each other in the circumferential direction around the right arc tooth plate. A right arc tooth plate relief hole is provided in the right arc tooth plate at a position corresponding to the right shaft seat hole of the valve body. The square head of the upper support shaft of the right switching valve extends above the right arc tooth plate relief hole. The right operation sleeve is fixed to the lower side of the left end of the right operation handle and is matched with the square head of the upper support shaft of the right switching valve. The right end of the right operation handle is configured as a manual operation gripping end. The right locking handle is located below the right operation handle. The right end of the right locking handle is hinged to the right operation handle by a right locking handle hinge pin. A right locking handle return spring is provided in the middle. The lower end of the right locking handle return spring is supported on the right locking handle, and the upper end is supported on the lower side of the right operation handle. The right end of the right locking handle is configured as a free end. Among them, a right limiting flange that is matched or disengaged with the right arc tooth plate groove on the right arc tooth plate is formed at the front side of the right locking handle and to the left of the right locking handle hinge pin.

[0014] Another task of the present utility model is completed in this way. A fire truck is equipped with an inlet valve structure as described above.

[0015] The technical effect of the technical solution provided by the utility model is that: since the valve mechanism can be driven to rotate accordingly by operating the valve position pivot switching mechanism clockwise or counterclockwise, and when the valve mechanism is rotated to the extent that the left connecting pipe interface of the water tank and the right connecting pipe interface of the water tank are in contact and matched, the left and right connecting pipe interfaces of the water tank are closed, and the left and right connecting ports of the external environment water source hose are opened, so that water drawn from rivers, ponds and lakes can be used as fire water; when the valve mechanism is rotated to the extent that the left and right connecting ports of the external environment water source hose are in contact and matched, the left and right connecting ports of the external environment water source hose are closed, and the water in the water tank of the fire truck is used for fire fighting and disaster relief; when the valve mechanism is rotated to one of the left and right connecting pipe interfaces of the water tank and simultaneously rotated to the extent that one of the left and right connecting ports of the external environment water source hose is in contact and matched, water can be supplied by the other of the left and right connecting pipe interfaces of the water tank and the other of the left and right connecting ports of the external environment water source hose, so that the water tank water and the water of the external environment such as rivers, ponds and lakes are shared to save water in the water tank. The type of fire-fighting water can be selected in a targeted manner according to the severity and scope of the fire, ensuring sufficient water supply to the fire-fighting site; the above-mentioned water inlet valve structure is equipped on the fire truck, which can meet the fire truck's flexible selection of water sources when extinguishing fires and rescuing disasters. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is an assembly structure diagram of the utility model;

[0017] Figure 2 For this utility model Figure 1 Top view after assembly and with the valve cover removed;

[0018] Figure 3 It is a schematic diagram of an application example of the utility model. DETAILED DESCRIPTION

[0019] In order to more clearly understand the technical essence and beneficial effects of the present invention, the applicant provides a detailed description in the form of embodiments below. However, the description of the embodiments is not a limitation on the present invention. Any equivalent changes made based on the concept of the present invention that are merely formal and not substantial should be regarded as within the scope of the technical solution of the present invention.

[0020] In the following description, all concepts related to up, down, left, right, front and back directions or orientations are based on Figure 1 The position state is taken as a reference, and therefore it cannot be understood as a special limitation on the technical solution provided by the utility model.

[0021] See also Figure 1, showing a valve body 1, on the side of which there is a group of valve body water inlet interfaces 12 communicating with the valve body cavity 11 and a valve body water outlet interface 13. In the use state, the valve body water outlet interface 13 is connected to the water inlet interface 51 of the water pump 5 shown by Figure 3 ; showing a valve cover 2, which is sealingly fixed to the upper open position of the aforementioned valve body 1; showing a valve mechanism 3, which is arranged in the aforementioned valve body cavity 11, and the bottom of the valve mechanism 3 is pivotally supported on the bottom wall 111 of the valve body cavity 11 of the valve body cavity. The middle part of the valve mechanism 3 cooperates with the side of the valve body water inlet interface 12 facing the valve body cavity 11, and the top of the valve mechanism 3 is rotationally matched with the aforementioned valve cover 2 and extends above the valve cover 2; a valve position pivot switching mechanism 4, which cooperates with the top of the aforementioned valve mechanism 3 at a position corresponding to above the aforementioned valve cover 2.

[0022] As the technical key points of the technical solution provided by the present invention: the aforementioned group of valve body water inlet interfaces 12 includes a water tank left connection pipe interface 121 formed on the left side of the valve body 1, a water tank right connection pipe interface 122 formed on the right side of the valve body 1, an external environment water source water belt left connection port 123 formed at the left end of the front side of the valve body 1, and an external environment water source water belt right connection port 124 formed at the right end of the front side of the valve body 1. The aforementioned valve body water outlet interface 13 is formed at the middle position of the rear side of the valve body 1. It is undoubtedly that the aforementioned left and right connection pipe interfaces 121, 122 of the water tank and the left and right connection ports 123, 124 of the external environment water source water belt communicate with the valve body cavity 11, that is, used to introduce water into the valve body cavity 11. The aforementioned external environment water source is not limited to the water of natural water sources such as rivers, ponds and lakes.

[0023] Continue to see Figure 1 , on the upper surface of the upper open part of the aforementioned valve body 1 facing upward and surrounding the periphery of the valve body 1, there is a valve cover sealing ring groove 14. An valve cover sealing ring 141 is embedded in the valve cover sealing ring groove 14, and valve cover fixing screw holes 15 are also spaced apart outside the valve cover sealing ring groove 14. On the aforementioned valve cover 2 and at positions corresponding to the valve cover fixing screw holes 15, there are valve cover screw holes 21. The valve cover screw 211 is screwed into the aforementioned valve cover fixing screw holes 15 at positions corresponding to the valve cover screw holes 21 to fix the valve seat 2 to the upper open position of the valve body 1, and the four peripheral edge parts of the lower side of the valve cover 2 and the upper open part of the valve body 1 are sealed by the aforementioned valve cover sealing ring 141.

[0024] Continue to see Figure 1, at the center position of the left end of the aforementioned valve cover 2, a left valve seat 22 of the valve cover is formed, and at the center position of the right end of the valve cover 2, a right valve seat 23 of the valve cover is formed; within the valve body cavity 11 of the aforementioned valve body 1 and at the intersection position corresponding to both the left connecting pipe interface 121 of the water tank and the left connecting port 123 of the external environment water source hose facing the valve body cavity 11, a left valve rotating support seat 112 is formed, and at the intersection position corresponding to both the right connecting pipe interface 122 of the water tank and the right connecting port 124 of the external environment water source hose facing the valve body cavity 11, a right valve rotating support seat 113 is formed, and the aforementioned left valve seat 22 of the valve cover and the left valve rotating support seat 112 are on the same longitudinal axis, and the aforementioned right valve seat 23 of the valve cover and the right valve rotating support seat 113 are on the same longitudinal axis; the aforementioned valve mechanism 3 is rotationally matched with the left valve seat 22 of the valve cover and the left valve rotating support seat 112 and is also rotationally matched with the right valve seat 23 of the valve cover and the right valve rotating support seat 113 at the same time; the aforementioned valve position pivot switching mechanism 4 is matched with the top of the aforementioned valve mechanism 3 at a position above the aforementioned left valve seat 22 of the valve cover and the right valve seat 23 of the valve cover.

[0025] A water tank left connecting pipe interface sealing ring 1211 is fixed by screws within the aforementioned left connecting pipe interface 121 of the water tank, a water tank right connecting pipe interface sealing ring 1221 is fixed by screws within the aforementioned right connecting pipe interface 122 of the water tank, an external environment water source hose left connecting port sealing ring 1231 is fixed by screws within the aforementioned left connecting port 123 of the external environment water source hose, and an external environment water source hose right connecting port sealing ring 1241 is fixed by screws within the aforementioned right connecting port 124 of the external environment water source hose. The aforementioned water tank left and right connecting pipe interface sealing rings 1211, 1221 and the external environment water source hose left and right connecting port sealing rings 1231, 1241 are each rubber sealing rings and each form a sealing flange edge at one end facing the valve body cavity 11, so as to form a good seal with the valve mechanism 3 which will be described in detail below.

[0026] The aforementioned valve mechanism 3 includes a left switching valve 31 and a right switching valve 32. A left switching valve upper support shaft arm plate 311 extends rightward from the top of the left switching valve 31. A left switching valve upper support shaft 3111 is fixed to the upward-facing side of the left switching valve upper support shaft arm plate 311. The lower end of the left switching valve upper support shaft 3111 is rotationally engaged with the left valve cover shaft seat 22 described above. The upper end of the left switching valve upper support shaft 3111 is configured as a left switching valve upper support shaft square head 31111, and the left switching valve upper support shaft square head 31111 extends above the left valve cover shaft seat 22. A left switching valve lower support shaft arm plate 312 extends rightward from the bottom of the left switching valve 31. A left switching valve lower support shaft 3121 is fixed to the downward-facing side of the left switching valve lower support shaft arm plate 312. The left switching valve lower support shaft 3121 is rotatably supported on the aforementioned left valve rotating support seat 112. The left switching valve 31 rotates clockwise or counterclockwise between the aforementioned water tank left connection pipe interface 121 and the external environment water source hose left connection port 123. When it rotates to the extent of being in contact and cooperation with the water tank left connection pipe interface 121, it closes the water tank left connection pipe interface 121 and simultaneously opens the external environment water source hose left connection port 123. When the left switching valve 31 rotates to the extent of being in contact and cooperation with the external environment water source hose left connection port 123, it closes the external environment water source hose left connection port 123 and simultaneously opens the water tank left connection pipe interface 121. A right switching valve upper support shaft arm plate 321 extends leftward from the top of the right switching valve 32. A right switching valve upper support shaft 3211 is fixed to the upward-facing side of the right switching valve upper support shaft arm plate 321. The lower end of the right switching valve upper support shaft 3211 is rotationally engaged with the right valve cover shaft seat 23 described above. The upper end of the right switching valve upper support shaft 3211 is configured as a right switching valve upper support shaft square head 32111, and the right switching valve upper support shaft square head 32111 extends above the right valve cover shaft seat 23. A right switching valve lower support shaft arm plate 322 extends leftward from the bottom of the right switching valve 32. A right switching valve lower support shaft 3221 is fixed to the downward-facing side of the right switching valve lower support shaft arm plate 322. The right switching valve lower support shaft 3221 is rotatably supported on the aforementioned right valve rotating support seat 113;The aforementioned valve position pivot switching mechanism 4 cooperates with the left switching valve upper support shaft square head 31111 and the right switching valve upper support shaft square head 32111 at a position above the left valve cover shaft seat 22 and the right valve cover shaft seat 23 of the aforementioned valve cover. The right switching valve 32 rotates clockwise or counterclockwise between the right connection pipe interface 122 of the aforementioned water tank and the right connection port 124 of the external environmental water source hose. When it rotates to the extent of being in contact and cooperation with the right connection pipe interface 122 of the water tank, it closes the right connection pipe interface 122 of the water tank and simultaneously opens the right connection port 124 of the external environmental water source hose. When the right switching valve 32 rotates to the extent of being in contact and cooperation with the right connection port 124 of the external environmental water source hose, it closes the right connection port 124 of the external environmental water source hose and simultaneously opens the right connection pipe interface 122 of the water tank.;

[0027] Continue to see Figure 1 , a valve cover left shaft seat hole 221 for the rotational cooperation of the aforementioned left switching valve upper support shaft 3111 is formed at the central position of the aforementioned left valve cover shaft seat 22. A pair of left switching valve upper support shaft sealing rings 31112 are embedded on the aforementioned left switching valve upper support shaft 3111, and the pair of left switching valve upper support shaft sealing rings 31112 are in sealing cooperation with the hole wall of the aforementioned valve cover left shaft seat hole 221; a valve cover right shaft seat hole 231 for the rotational cooperation of the aforementioned right switching valve upper support shaft 3211 is formed at the central position of the aforementioned right valve cover shaft seat 23. A pair of right switching valve upper support shaft sealing rings 32112 are embedded on the aforementioned right switching valve upper support shaft 3211, and the pair of right switching valve upper support shaft sealing rings 32112 are in sealing cooperation with the hole wall of the aforementioned valve cover right shaft seat hole 231.

[0028] Continue to see Figure 1 , the aforementioned valve position pivot switching mechanism 4 includes a left switching valve upper support shaft manual operation device 41 and a right switching valve upper support shaft manual operation device 42. The left switching valve upper support shaft manual operation device 41 cooperates with the left switching valve upper support shaft square head 31111 at a position above the aforementioned left valve cover shaft seat 22, and the right switching valve upper support shaft manual operation device 42 cooperates with the right switching valve upper support shaft square head 32111 at a position above the aforementioned right valve cover shaft seat 23.

[0029] On the outer wall of the left shaft seat 22 of the aforementioned valve cover, a pair of left arc tooth plate fixing ears 222 are formed. This pair of left arc tooth plate fixing ears 222 are spaced 180° from each other in the circumferential direction around the left shaft seat 22 of the valve cover; the aforementioned left switching valve upper support shaft manual operation device 41 includes a left operation handle 411, a left operation sleeve 412, a left locking handle 413, and a left arc tooth plate 414. The left arc tooth plate 414 is fixed to the left shaft seat 22 of the valve cover at a position corresponding to the aforementioned left arc tooth plate fixing ears 222 by a pair of left arc tooth plate fixing screws. At the edge of this left arc tooth plate 414, a pair of left arc tooth plate stop feet 4141 are formed. This pair of left arc tooth plate stop feet 4141 are spaced 180° from each other in the circumferential direction around the left arc tooth plate 414. At a position on the left arc tooth plate 414 and corresponding to the aforementioned valve seat left shaft seat hole 221, a left arc tooth plate relief hole 4142 is provided. The square head 31111 of the upper support shaft of the aforementioned left switching valve extends above the left arc tooth plate relief hole 4142. The left operation sleeve 412 is fixed to the lower side of the right end of the left operation handle 411 and is engaged with the square head 31111 of the upper support shaft of the aforementioned left switching valve. The left end of the left operation handle 411 is configured as a manual operation gripping end. The left locking handle 413 is located below the left operation handle 411. The right end of this left locking handle 413 is hinged to the left operation handle 411 by a left locking handle hinge pin 4131. A left locking handle return spring 4132 is arranged in the middle. The lower end of this left locking handle return spring 4132 is supported on the left locking handle 413, and the upper end is supported on the lower side of the left operation handle 411. The left end of the left locking handle 413 is configured as a free end; wherein, on the front side of the aforementioned left locking handle 413 and at a position on the right side of the aforementioned left locking handle hinge pin 4131, a left limiting flange 4133 that cooperates with or disengages from the left arc tooth plate tooth groove 4143 on the left arc tooth plate 414 is formed.

[0030] Continue to see Figure 1, a pair of right arc tooth plate fixing ears 232 are formed on the outer wall of the right shaft seat 23 of the valve cover. The pair of right arc tooth plate fixing ears 232 are spaced 180° from each other circumferentially around the right shaft seat 23 of the valve cover. The above-mentioned right switching valve upper support shaft manual operation device 42 includes a right operation handle 421, a right operation sleeve 422, a right locking handle 423 and a right arc tooth plate 424. The right arc tooth plate 424 is fixed to the right shaft seat 23 of the valve cover at a position corresponding to the above-mentioned right arc tooth plate fixing ear 232 by a pair of right arc tooth plate fixing screws. A pair of right arc tooth plate stoppers 4241 are formed at the edge of the right arc tooth plate 424. The pair of right arc tooth plate stoppers 4241 are spaced 180° from each other circumferentially around the right arc tooth plate 424. A right arc tooth plate relief hole 4242 is provided on the right arc tooth plate 424 and at a position corresponding to the above-mentioned right shaft seat hole 231 of the valve seat. The square head 32111 of the upper support shaft of the right switching valve extends above the right arc tooth plate relief hole 4242. The right operation sleeve 422 is fixed to the lower side of the left end of the right operation handle 421 and is matched with the square head 32111 of the upper support shaft of the right switching valve. The right end of the right operation handle 421 is configured as a manual operation gripping end. The right locking handle 423 is located below the right operation handle 421. The right end of the right locking handle 423 is hinged to the right operation handle 421 by a right locking handle hinge pin 4231. A right locking handle return spring 4232 is arranged in the middle. The lower end of the right locking handle return spring 4232 is supported on the right locking handle 423, and the upper end is supported on the lower side of the right operation handle 421. The right end of the right locking handle 423 is configured as a free end. Among them, a right limiting flange 4233 that cooperates with or disengages from the right arc tooth plate tooth groove 4243 on the right arc tooth plate 424 is formed on the front side of the above-mentioned right locking handle 423 and at a position to the left of the above-mentioned right locking handle hinge pin 4231.

[0031] As shown by Figure 1 , the opposite sides of the above-mentioned left switching valve 31 and right switching valve 32 are each configured as arc-shaped surfaces.

[0032] Please refer to Figure 2 and in combination with Figure 1 , currently by Figure 2Taking the position state as an example, the arc surface of the left switching valve 31 just contacts and mates with the sealing flange edge of the sealing ring of the left water tank connecting pipe interface sealing ring 1211 to close the left water tank connecting pipe interface 121. At the same time, the arc surface of the right switching valve 32 just contacts and mates with the sealing flange edge of the sealing ring of the right water tank connecting pipe interface sealing ring 1221 to close the right water tank connecting pipe interface 122. In the above state, the left and right connection ports 123 and 124 of the external environment water source water belt are both in the open state. If it is in the fire extinguishing state, then one end of each water belt is connected to the left and right connection ports 123 and 124 of the external environment water source water belt, and the other end of the water belt extends to a water area such as a river, pond, or lake to draw water. The water introduced into the valve body cavity 11 from the left and right connection ports 123 and 124 of the external environment water source water belt is led out from the valve body water outlet interface 13 and used to supply a pipeline connected to the water inlet of a water pump (not shown in the figure) to extinguish the fire source.

[0033] Please refer to Figure 3 and in combination with Figure 1 and Figure 2 , in Figure 3 a water tank left water supply pipe 6a and a water tank right water supply pipe 6b connected to the water storage tank of the fire truck, that is, the water tank abbreviated above, are shown. The left and right water supply pipes 6a and 6b of the water tank are respectively flange-connected to the left and right water tank connecting pipe interfaces 121 and 122. In Figure 3 a left fire fighting water intake belt 7a and a right fire fighting water intake belt 7b are also shown. One end of the left and right fire fighting water intake belts 7a and 7b is respectively connected to the left and right connection ports 123 and 124 of the external environment water source water belt of the quick-connection type, and the other end extends to a natural water area such as the above-mentioned river, pond, or lake to draw water. According to the applicant's above description of Figure 1Regarding the description, the main ways to select the method of supplying water to the water pump, that is, the method of introducing water into the valve body cavity 11, are as follows: First, the left and right switching valves 31 and 32 close the left and right connection pipe interfaces 121 and 122 of the water tank, and open the left and right connection ports 123 and 124 of the external environmental water source belt, so as to use the external environmental water; Second, the left and right switching valves 31 and 32 close the left and right connection ports 123 and 124 of the external environmental water source belt, and open the left and right connection pipe interfaces 121 and 122 of the water tank, so as to use the water in the water tank; Third, close one of the left and right connection pipe interfaces 121 and 122 of the water tank, and open the other one. At the same time, close one of the left and right connection ports 123 and 124 of the external environmental water source belt, and open the other one. In this case, water is supplied simultaneously by the water tank through the aforementioned one interface and through a connection port of an external environmental water source; Fourth, connect the left and right fire water intake hoses 7a and 7b to two fire hydrants respectively. In this case, water from the two fire hydrants is introduced into the valve body cavity 11 through the left and right connection ports 123 and 124 of the external environmental water source belt, and is pumped out by the water pump 5 and supplied to the fire hose or fire monitor through the pipeline for fire extinguishing. The applicant needs to explain that there may be other situations for the selection form of fire water, which will not be elaborated one by one here.

[0034] The applicant will briefly describe below the control operation of the valve position pivot switching mechanism 4 on the valve mechanism 3. The so-called brief description means to describe a certain situation. Since the operation of the right switching valve upper support shaft manual operation device 42 on the right switching valve 32 is similar to the operation form of the left switching valve upper support shaft manual operation device 41 on the left switching valve 31, the applicant selects the latter, that is, the operation of the left switching valve upper support shaft manual operation device 41 on the left switching valve 31 for detailed description. The firefighter holds and squeezes, that is, simultaneously holds the left end of the left operation handle 411 and the left end of the left locking handle 413, and applies an upward force to the left end of the left locking handle 413, that is, a force that abuts against the side of the left operation handle 411 facing downward. At this time, with the left locking handle hinge pin shaft 4131 as the pivot point of rotation, the left end of the left locking handle 413 moves upward, and the left locking handle return spring 4132 is compressed and stores energy. At the same time, since the right end of the left locking handle 413 tilts downward, the aforementioned left limiting flange 4133 moves downward from the position of the left locking tooth groove 4143 of the left locking tooth plate 414 and releases its engagement with the left locking tooth groove 4143. At this time, if the firefighter turns the left operation handle 411 90° in the clockwise direction, then the left operation sleeve 412 also rotates 90° in the clockwise direction accordingly. The left operation sleeve 412 drives the left switching valve upper support shaft 3111 through the square head 31111 of the left switching valve upper support shaft, and thus the left switching valve upper support shaft 3111 drives the left switching valve 31 through the left switching valve upper support shaft arm plate 311. That is to say, since the left switching valve lower support shaft 3121 of the left switching valve lower support shaft arm plate 312 of the left switching valve 31 is rotatably supported on the left valve rotating support seat 112, the left switching valve 31 switches from the previous closed position facing the left connection port 123 of the external environment water source hose to the closed position facing the left connection pipe interface 121 of the water tank, opening the left connection port 123 of the external environment water source hose. The water used in this situation is the aforementioned external environment water, and vice versa, which will not be repeated. When the firefighter completes the aforementioned operation and leaves the hand from the left operation handle 411 and the left locking handle 413, under the restoring force of the left locking handle return spring 4132, the aforementioned left limiting flange 4133 is reset upward and aligned with the left arc tooth plate tooth groove 4143, thus avoiding the abnormal rotation of the left operation handle 411.

[0035] In summary, the technical solution provided by the present utility model makes up for the deficiencies in the prior art, successfully completes the invention task, and faithfully realizes the technical effects described by the applicant in the technical effect column above.

Claims

1. A water supply selectable water inlet valve structure, comprising a valve body (1), wherein a group of valve body water inlet interfaces (12) and a valve body water outlet interface (13) communicating with a valve body cavity (11) are formed on the side of the valve body (1), and the valve body water outlet interface (13) is matched with a water pump water inlet interface (51) of a water pump (5) in a use state; a valve cover (2), wherein the valve cover (2) is sealed and fixed to the upper open position of the valve body (1); and a valve mechanism (3), wherein the valve mechanism (3) is arranged in the valve body cavity (11), and The bottom of the valve mechanism (3) is pivotally supported on the bottom wall (111) of the valve body cavity (11), the middle of the valve mechanism (3) is matched with the side of the valve body water inlet interface (12) facing the valve body cavity (11), and the top of the valve mechanism (3) is rotationally matched with the valve cover (2) and extends above the valve cover (2); the valve position pivot switching mechanism (4) is matched with the top of the valve mechanism (3) at a position corresponding to the top of the valve cover (2), characterized in that: The set of valve body water inlet interfaces (12) comprises a left water tank connecting pipe interface (121) formed on the left side of the valve body (1), a right water tank connecting pipe interface (122) formed on the right side of the valve body (1), a left external environment water source hose connection port (123) formed on the front left end of the valve body (1), and a right external environment water source hose connection port (124) formed on the front right end of the valve body (1), and the valve body water outlet interface (13) is formed in the center position of the rear side of the valve body (1).

2. The water supply selectable water inlet valve structure according to claim 1, characterized in that: A valve cover sealing ring groove (14) is formed on the upper open part of the valve body (1) on one side of the surface facing upward and around the valve body (1), a valve cover sealing ring (141) is embedded in the valve cover sealing ring groove (14), and valve cover fixing screw holes (15) are also spaced around the outer side of the valve cover sealing ring groove (14), and valve cover screw holes (21) are formed on the valve cover (2) at positions corresponding to the valve cover fixing screw holes (15), and valve cover screws (211) are screwed into the valve cover fixing screw holes (15) at positions corresponding to the valve cover screw holes (21) to fix the valve seat (2) and the upper open part of the valve body (1), and the valve cover sealing ring (141) forms a seal between the peripheral edge of the valve cover (2) facing downward and the upper open part of the valve body (1).

3. The water supply selectable water inlet valve structure according to claim 1, characterized in that: A left valve cover shaft seat (22) is formed at the center position of the left end of the valve cover (2), and a right valve cover shaft seat (23) is formed at the center position of the right end of the valve cover (2); a left valve rotation support seat (112) is formed in the valve body cavity (11) of the valve body (1) and at the intersection position corresponding to the left connecting pipe interface (121) of the water tank and the left connecting port (123) of the external environment water source hose facing the valve body cavity (11), and a right valve rotation support seat is formed at the intersection position corresponding to the right connecting pipe interface (122) of the water tank and the right connecting port (124) of the external environment water source hose facing the valve body cavity (11). (113), and the valve cover left shaft seat (22) and the left valve rotation support seat (112) are on the same longitudinal axis, and the valve cover right shaft seat (23) and the right valve rotation support seat (113) are on the same longitudinal axis; the valve mechanism (3) is rotationally matched with the valve cover left shaft seat (22) and the left valve rotation support seat (112) and also rotationally matched with the valve cover right shaft seat (23) and the right valve rotation support seat (113); the valve position pivot switching mechanism (4) is matched with the top of the valve mechanism (3) at a position corresponding to the upper part of the valve cover left shaft seat (22) and the valve cover right shaft seat (23).

4. The water supply selectable water inlet valve structure according to claim 1, characterized in that: A water tank left connecting pipe interface sealing ring (1211) is fixed by screws in the water tank left connecting pipe interface (121), a water tank right connecting pipe interface sealing ring (1221) is fixed by screws in the water tank right connecting pipe interface (122), a left connecting port sealing ring (1231) of an external environment water source hose is fixed by screws in the left connecting port (123) of the external environment water source hose, and a right connecting port sealing ring (1241) of an external environment water source hose is fixed by screws in the right connecting port (124) of the external environment water source hose.

5. The water supply selectable water inlet valve structure according to claim 3, characterized in that: The valve mechanism (3) comprises a left switching valve (31) and a right switching valve (32), wherein a left switching valve upper supporting shaft arm plate (311) extends rightward from the top of the left switching valve (31), and a left switching valve upper supporting shaft (3111) is fixed to the upper side of the left switching valve upper supporting shaft arm plate (311), wherein the lower end of the left switching valve upper supporting shaft (3111) is rotatably matched with the valve cover left shaft seat (22), and the upper end of the left switching valve upper supporting shaft (3111) is configured as a left switching valve upper supporting shaft square head (31111), and the left switching valve upper supporting shaft square head (31111) extends to the valve cover left shaft seat (22). Above the seat (22), a left switching valve lower supporting shaft arm plate (312) extends rightward from the bottom of the left switching valve (31), and a left switching valve lower supporting shaft (3121) is fixed to the side of the left switching valve lower supporting shaft arm plate (312) facing downward, and the left switching valve lower supporting shaft (3121) is rotatably supported on the left valve rotating supporting seat (112). The left switching valve (31) rotates clockwise or counterclockwise between the left connecting pipe interface (121) of the water tank and the left connecting port (123) of the external environment water source hose, and when it rotates to the extent of contacting and matching with the left connecting pipe interface (121) of the water tank, the water is fed into the water tank by the left switching valve (31). The left connecting pipe interface (121) of the water tank is closed, and the left connecting port (123) of the external environment water source hose is opened at the same time. When the left switching valve (31) is rotated to the extent of contacting and matching with the left connecting port (123) of the external environment water source hose, the left connecting port (123) of the external environment water source hose is closed, and the left connecting pipe interface (121) of the water tank is opened at the same time. A right switching valve upper supporting shaft arm plate (321) extends to the left from the top of the right switching valve (32). A right switching valve upper supporting shaft (3211) is fixed to the upper side of the right switching valve upper supporting shaft arm plate (321). The right switching valve upper supporting shaft (3211) ) is rotatably matched with the valve cover right shaft seat (23), and the upper end of the right switching valve upper support shaft (3211) is constituted as a right switching valve upper support shaft square head (32111), and the right switching valve upper support shaft square head (32111) extends to the upper part of the valve cover right shaft seat (23), and a right switching valve lower support shaft arm plate (322) is extended to the left at the bottom of the right switching valve (32), and a right switching valve lower support shaft (3221) is fixed on the downward side of the right switching valve lower support shaft arm plate (322), and the right switching valve lower support shaft (3221) is rotatably supported on the right valve rotating support seat (113);The valve position pivot switching mechanism (4) cooperates with the supporting shaft square head (31111) on the left switching valve and the supporting shaft square head (32111) on the right switching valve at a position corresponding to the upper part of the left valve cover shaft seat (22) and the right valve cover shaft seat (23), and the right switching valve (32) rotates clockwise or counterclockwise between the right connecting pipe interface (122) of the water tank and the right connecting port (124) of the external environment water source hose, and when it rotates to contact with the right connecting pipe interface (122) of the water tank, When the right switching valve (32) rotates to a degree of contact and matching with the right connecting port (124) of the external environment water source hose, it closes the right connecting port (124) of the external environment water source hose and opens the right connecting port (122) of the water tank; when the right switching valve (32) rotates to a degree of contact and matching with the right connecting port (124) of the external environment water source hose, it closes the right connecting port (124) of the external environment water source hose and opens the right connecting pipe interface (122) of the water tank; the sides of the left switching valve (31) and the right switching valve (32) facing each other are each formed into an arc surface.

6. The water supply selectable water inlet valve structure according to claim 5, characterized in that: A valve cover left shaft seat hole (221) for rotationally engaging the left switching valve upper support shaft (3111) is formed at the central position of the valve cover left shaft seat (22), and a pair of left switching valve upper support shaft sealing rings (31112) are embedded on the left switching valve upper support shaft (3111), and the pair of left switching valve upper support shaft sealing rings (31112) are sealingly engaged with the hole wall of the valve cover left shaft seat hole (221); a valve cover right shaft seat hole (231) for rotationally engaging the right switching valve upper support shaft (3211) is formed at the central position of the valve cover right shaft seat (23), and a pair of right switching valve upper support shaft sealing rings (32112) are embedded on the right switching valve upper support shaft (3211), and the pair of right switching valve upper support shaft sealing rings (32112) are sealingly engaged with the hole wall of the valve cover right shaft seat hole (231).

7. The water supply selectable water inlet valve structure according to claim 5, characterized in that: The valve position pivot switching mechanism (4) comprises a manual operating device (41) for the upper supporting shaft of the left switching valve and a manual operating device (42) for the upper supporting shaft of the right switching valve. The manual operating device (41) for the upper supporting shaft of the left switching valve cooperates with the square head (31111) of the upper supporting shaft of the left switching valve at a position corresponding to the upper position of the left shaft seat (22) of the valve cover, and the manual operating device (42) for the upper supporting shaft of the right switching valve cooperates with the square head (32111) of the upper supporting shaft of the right switching valve at a position corresponding to the upper position of the right shaft seat (23) of the valve cover.

8. The water supply selectable water inlet valve structure according to claim 7, characterized in that: A pair of left arc toothed plate fixing ears (222) are formed on the outer wall of the valve cover left shaft seat (22), and the pair of left arc toothed plate fixing ears (222) are 180 degrees apart from each other in the circumferential direction of the valve cover left shaft seat (22); the left switching valve upper support shaft manual operating device (41) comprises a left operating handle (411), a left operating sleeve (412), a left locking handle (413) and a left arc toothed plate (414), and the left arc toothed plate (414) is fixedly secured to the left arc toothed plate fixing ears (222) by a pair of left arc toothed plate fixing screws. 2) is fixed to the left shaft seat (22) of the valve cover, a pair of left arc toothed plate blocking feet (4141) are formed at the edge of the left arc toothed plate (414), the pair of left arc toothed plate blocking feet (4141) are 180° apart from each other in the circumferential direction of the left arc toothed plate (414), a left arc toothed plate clearance hole (4142) is provided on the left arc toothed plate (414) and at a position corresponding to the left shaft seat hole (221) of the valve seat, the square head (31111) of the support shaft on the left switching valve extends to the left arc toothed plate clearance hole (4142) ), a left operating sleeve (412) is fixed to the right end of the left operating handle (411) facing downward and cooperates with the square head (31111) of the support shaft on the left switching valve, the left end of the left operating handle (411) is configured as a manual operation gripping end, the left locking handle (413) is located below the left operating handle (411), the right end of the left locking handle (413) is hinged to the left operating handle (411) through the left locking handle hinge pin (4131), and a left locking handle reset spring (4131) is provided in the middle. 32), the lower end of the left locking handle return spring (4132) is supported on the left locking handle (413), and the upper end is supported on the downward side of the left operating handle (411), and the left end of the left locking handle (413) is configured as a free end; wherein, a left limiting flange (4133) is configured on the front side of the left locking handle (413) and on the right side of the left locking handle hinge pin (4131) to cooperate with or release the left arc tooth plate groove (4143) on the left arc tooth plate (414).

9. The water supply selectable water inlet valve structure according to claim 7, characterized in that: A pair of right arc tooth plate fixing ears (232) are formed on the outer wall of the valve cover right shaft seat (23), and the pair of right arc tooth plate fixing ears (232) are 180 degrees apart from each other in the circumferential direction of the valve cover right shaft seat (23); the right switching valve upper support shaft manual operating device (42) comprises a right operating handle (421), a right operating sleeve (422), a right locking handle (423) and a right arc tooth plate (424), and the right arc tooth plate (424) is connected to the right shaft seat (23) by a pair of right The arc tooth plate fixing screw is fixed to the right shaft seat (23) of the valve cover at a position corresponding to the right arc tooth plate fixing ear (232), and a pair of right arc tooth plate blocking feet (4241) are formed at the edge of the right arc tooth plate (424). The pair of right arc tooth plate blocking feet (4241) are 180° apart from each other in the circumferential direction of the right arc tooth plate (424), and a right arc tooth plate is provided on the right arc tooth plate (424) at a position corresponding to the right shaft seat hole (231) of the valve seat. The arc tooth plate gives way hole (4242), the square head (32111) of the upper support shaft of the right switching valve extends to the upper side of the right arc tooth plate gives way hole (4242), the right operating sleeve (422) is fixed to the left end of the right operating handle (421) facing downward and cooperates with the square head (32111) of the upper support shaft of the right switching valve, the right end of the right operating handle (421) is configured as a manual operation gripping end, and the right locking handle (423) is located at the right operating handle ( 421), the right end of the right locking handle (423) is hinged to the right operating handle (421) through a right locking handle hinge pin (4231), a right locking handle reset spring (4232) is arranged in the middle, the lower end of the right locking handle reset spring (4232) is supported on the right locking handle (423), and the upper end is supported on the side of the right operating handle (421) facing downward, and the right end of the right locking handle (423) is constituted as a free end; Among them, a right limiting flange (4233) is formed on the front side of the right locking handle (423) and on the left side of the right locking handle hinge pin (4231) to cooperate or release the cooperation with the right arc tooth plate groove (4243) on the right arc tooth plate (424).

10. A fire truck, characterized in that: Equipped with a water inlet valve structure as described in any one of claims 1 to 9.

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